Answer:
(a) [tex]\bar x_1 = 43.7[/tex] [tex]\bar x_2 = 30.25[/tex]
(b) [tex]\sigma_1 = 16.93[/tex] [tex]\sigma_2 = 7.14[/tex]
(c) Smoking increases the time to fall asleep
Explanation:
Solving (a): The sample mean of each group
Mean is calculated as:
[tex]\bar x = \frac{\sum x}{n}[/tex]
So, we have:
Smokers
[tex]n_1= 12[/tex] and
[tex]\bar x_1 = \frac{69.3 +56.0+ 22.1 +47.6+ 53.2+ 48.1+ 52.7 +34.4+ 60.2 +43.8 +23.2 +13.8}{12}[/tex]
[tex]\bar x_1 = \frac{524.4}{12}[/tex]
[tex]\bar x_1 = 43.7[/tex]
Non Smokers
[tex]n_2 = 15[/tex] and
[tex]\bar x = \frac{28.6 +25.1 +26.4 +34.9 +28.8 +28.4 +38.5 +30.2 +30.6 +31.8 +41.6 +21.1 +36.0 +37.9 +13.9}{15}[/tex]
[tex]\bar x_2 = \frac{453.8}{15}[/tex]
[tex]\bar x_2 = 30.25[/tex]
Solving (b): The standard deviation of each group
This is calculated as:
[tex]\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n-1}}[/tex]
For smokers
[tex]n_1= 12[/tex]
So:
[tex]\sigma_1 = \sqrt{\frac{(69.3 -43.7)^2+(56.0-43.7)^2+..........+(13.8-43.7)^2}{12-1}}[/tex]
[tex]\sigma_1 = \sqrt{\frac{3152.04}{11}}[/tex]
[tex]\sigma_1 = \sqrt{286.5491}[/tex]
[tex]\sigma_1 = 16.93[/tex]
For non-smokers
[tex]n_2 = 15[/tex]
So:
[tex]\sigma_2 = \sqrt{\frac{(28.6 -30.25)^2+(25.1 -30.25)^2+..........+(13.9 -30.25)^2}{15-1}}[/tex]
[tex]\sigma_2 = \sqrt{\frac{713.2575}{14}}[/tex]
[tex]\sigma_2 = \sqrt{50.9469}[/tex]
[tex]\sigma_2 = 7.14[/tex]
Solving (c): Impact of smoking on time to sleep
In (b), we have:
[tex]\sigma_1 = 16.93[/tex] --- smokers
[tex]\sigma_2 = 7.14[/tex] --- non-smokers
Smokers have larger standard deviation (i.e. large variability) than non-smokers. This means that smokers require more time to fall asleep.
Choose the word that matches each definition. 1. IP Address 2. Server 3. Port Each term is only used once._____________ a number used within a computer to identify a specific process ____________ a numerical reference to a particular device in a network ___________ a computer that handles requests and returns data to other computers in a network
Port a number used within a computer to identify a specific process.
IP Address a numerical reference to a particular device in a network.
Server a computer that handles requests and returns data to other computers in a network.
Explanation:A port number is a number used to uniquely identify a particular process, application or program on a computer. From the networking parlance, it is a logical address that uniquely identifies a process, protocol or application communicating with other process, protocol or application over a network. For example;
i. a file transfer protocol (FTP) could use a port number of 20 or 21.
ii. a simple mail transfer protocol (SMTP) could use a port number of 25
Internet Protocol (IP) address is a numerical reference or label assigned to a particular device in a network which helps to uniquely identify the device on the network. IP addresses (version 4) are expressed as a group of four numbers separated by a dot. For example, an IP address may look like this: 192.168.0.90
A server is a computer that receives requests from other computers, processes these requests and returns some data to the other computers in a network. In reality, these servers and the computers they serve can actually be some applications or programs. Servers provide resources, data, services or programs to other computers over a network.
Answer:
IP address: an Internet Protocol (IP) address is a numerical reference to a particular device in a network
port: a number used within a computer to identify a specific process
server: a computer that handles requests and returns data to other computers in a network
Explanation:
edge 2022
what is the most improved Android robot
Answer:
They are the humanoid robots.
Identify the error and write correct HTML program 5 Cyber Bullying Tips<\head>Don't Respond Talk to a trusted adult <|html>
Answer:
<html>
<head> Cyber Bullying Tips </head>
<body>
Don't Respond, Talk to a trusted adult
</body>
</html>
Why does brainly always say, "We're sorry, but we are not able to complete your registration at this time"?! Now I cant view any answers to any questions!
Answer and Explanation:
It's very likely a network issue. You could do a hard refresh on your browser or brainly app. Simply clear your application's cache or your browser data or cache and then try again. You could also try re-installing your app. If this doesn't work, please reach out to the Brainly customer support team for help.
A folder has been shared with other users and set to read-only. What does this mean for users?
Users can only read the name of the shared folder.
Users cannot add new folders or files.
Users can read and edit files.
Users can add new files but not new folders.
Answer:
It means that users can only read or, depending on that platform, read and edit files in the folder
Diana has created a graphic design portfolio for a major project. What kind of portfolio would increase Dlana's chances of getting selected?
OA
a portfolio with some case studies of her graphic design work
OB.
a portfolio with graphic designs in her favorite theme
Ос.
a portfolio containing contact numbers of references
OD.
a portfolio that emphasizes large images and many colors
OE. a portfolio that emphasizes her qualifications and experience
Answer:
Hello There!!
Explanation:
I believe the answer is O A. a portfolio with some case studies of her graphic design work.
hope this helps,have a great day!!
~Pinky~
What is the next line?
>>>
tupleB = (5, 7, 5, 10, 2,5)
tupleB.index(5,3)
>>>
A. 0
B. 5
C. 3
D. 1
The right answer is option 4: 2
Explanation:
Lists are used in Python to store elements of same or different data types.
Different functions are used in Python on List. One of them is count.
Count is used to count how many times a specific value occurs in a list.
The syntax for count is:
listname.count(value)
In the given code,
The output will be 2
Hence,
The right answer is option 4: 2
Hadoop is : open source software framework designed for distributing data-processing over inexpensive computers. data mining platform designed for storing and analyzing big data produced by web communications and transactions. high-speed platform used to analyze large data sets pre-configured hardware-software system designed for analyzing big data. NoSQL database technology that stores both data and procedures acting on the data as object
Answer: open-source software framework designed for distributing data-processing over inexpensive computers.
Explanation:
Hadoop refers to the collection of open-source software utilities which are important in facilitating the use of a network of several computers to solve big data.
It provides huge storage for different kinds of data, and the ability to handle concurrent tasks virtually. Therefore, the correct option is "open-source software framework designed for distributing data-processing over inexpensive computers".
Describa las etapas del arranque de viruta
Answer:
Las virutas son partículas que se eliminan mecánicamente de una pieza de trabajo mecanizada. En el contexto de la tecnología de fabricación, especialmente el mecanizado, el término se refiere principalmente a virutas de metal; En principio, sin embargo, las virutas se crean en todo tipo de mecanizado de cuerpos sólidos. Las astillas de madera son el resultado de la carpintería. Cuando se mecanizan plásticos, se crean virutas, así como cuando se mecanizan materiales minerales, cristalinos o amorfos como el vidrio, que a menudo se realiza mediante esmerilado.
list any three positive impacts of computer technology in our society?
Answer:
nWhich statement about the origins of the American population is true?
A most Americans descend from people who first populated this continent about 20,000 years ago
b about 98 percent of Americans live in this country due to the waves of Irish and German people who came in mid 1800s
c immigration expander the American population before 1806 ,bur has no significantly contributed to it since then
d the vast majority. of Americans ms either descended from immigrats or are immigrants themselves
Explanation:
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an_is a sepuence of precise instructions which result in a solution
Answer:
algorithm.
Explanation:
An algorithm can be defined as a standard formula or procedures which comprises of set of finite steps or instructions for solving a problem on a computer. The time complexity is a measure of the amount of time required by an algorithm to run till its completion of the task with respect to the length of the input.
Furthermore, the processing symbols and their functions used in developing an algorithm are oval (start or stop), diamond (decision-making), circle (on-page connector), parallelogram (input and output), rectangle (calculation), arrow (flow or direction) and pentagon (off-page connector).
Some of the characteristics of an algorithm include the following;
I. An algorithm can be written using pseudocode. A pseudocode refers to the description of the steps contained in an algorithm using a plain or natural language.
II. An algorithm can be visualized using flowcharts. A flowchart can be defined as a graphical representation of an algorithm for a process or workflow.
In conclusion, an algorithm is a sequence of precise instructions which result in a solution for solving problems using a computer system.
in a dark place you have only a match , a twig , campfire logs , and oil lamp and a candle which do you literally first /
a twig
a campfire
none of the above
Answer:
You would use a twig first :)
Explanation:
Answer:
The glowing embers from the crackling campfire lit up the nighttime sky.
Explanation:
Have you searched Buzz Ch.at on playstore
Answer:
Reorder terms.
y=52x−1
Cancel the common factor of 22.Factor 22 out of −2-2.
y−4=5x2+52⋅(2(−1))y-4=5x2+52⋅(2(-1))
Cancel the common factor.
y−4=5x2+52⋅(2⋅−1)y-4=5x2+52⋅(2⋅-1)
Rewrite the expression.
y−4=5x2+5⋅−1y-4=5x2+5⋅-1
Multiply 55 by −1-1.
y−4=5x2−5
When visiting or learning about other places, what new things have you experienced? Choose all that apply.
food and drink
music and art
languages
values and ideas
technology
Answer:
All of these answers
Explanation:
A ____ is an icon that does not directly represent a file, folder or application but serves as a link to it?
Answer:
Shortcut
Explanation:
A file can be defined as a computer resource that avails end users the ability to store or record data as a single unit on a computer storage device.
Generally, all files are identified by a name, icon, size, and type (format) such as audio, image, video, document, system, text, etc.
Furthermore, files are organized or arranged in directories. These directories are paths that describes the location wherein a file is stored on a computer system.
A software can be defined as a set of executable instructions (codes) or collection of data that is used typically to instruct a computer on how to perform a specific task and solve a particular problem. Thus, it's a computer program or application that comprises of sets of code for performing specific tasks on the system.
In Computer science, it's possible to create a shortcut in several directories (locations) on a computer, so as to reference a file, folder or software application and serve as an executable link.
Hence, a shortcut is an icon that does not directly represent a file, folder or application but serves as a link to it.
Additionally, deleting the shortcut of a data file, folder or software application would not permanently delete or uninstall the main data file respectively.
¿Por qué es importante usar adecuadamente el celular?
Answer:
to stop it from breaking
Explanation:
The smallest piece of information a computer can store is
Answer:
bit
Explanation:
confia
1 punto
María tiene una empresa de mercancia
seca, dicha empresa brinda su servicio de
ventas de estas mercancías al por mayor y
menor para su clientela. ¿De qué tipo de
Comercio hablamos en este ejemplo?: *
Answer:
Retailing.
Explanation:
La venta al por menor o retailing es el suministro de bienes físicos a los consumidores para uso personal, sea en pequeña o grandes cantidades, siempre que esté destinado a consumidores finales. Es un sector que consta de diferentes ramas (como la industria alimentaria, la industria de la moda, la industria del mobiliario para el hogar, etc.). El comercio minorista es el último eslabón de la cadena de suministro que va desde el fabricante hasta el consumidor.
Kiko loves to surf the internet and check on different websites. One day he received an email from unknown source. When he opens it, he was directed to a site and logged using his credit card number. After a few days,he learned that his card was use by someone in purchasing an expensive item. What internet threat did Kiko experience and what can you do to avoid it.
He experienced phishing
Phishing is a method of trying to gather personal information using deceptive e-mails and websites.
Here are some measures to avoid phishing. You can pick up the one you liked the most
Always check the spelling of the URLs in email links before you click or enter sensitive informationWatch out for URL redirects, where you're subtly sent to a different website with identical designIf you receive an email from a source you know but it seems suspicious, contact that source with a new email, rather than just hitting reply. Don't post personal data, like your birthday, vacation plans, or your address or phone number, publicly on social mediaChoose the issue that is occurring from the drop-down menu. During the , development teams transform the requirements into a software application design. During the , the software design is implemented by developers in code. In the , software is evaluated for quality. Any issues with the software are logged as to be resolved by developers. Software that is maintained by developers is said to be .
Answer: See explanation
Explanation:
During the, (software design phase), developmentt teams transform the requirements into a software application design.
During the (software development phase), the software design is implemented by developers in code.
In the (software evaluation phase), software is evaluated for quality.
Any issues with the software are logged as (bugs) to be resolved by developers.
Software that is maintained by developers is said to be (supported).
Answer:
1) 2
2) 1
3) 2
4) 2
5) 3
Explanation: just did it
Select the three reasons that the gaming industry is set to grow.
A) more colleges offering jobs in game design
B) a decrease in the average age of gamers
C) an expanding market on mobile phones
D) expanding markets in Asia
E) new accessories that will attract more players
Answer:
expanding markets in Asia, new accessories that will attract more players, an expanding market on mobile phones
Explanation:
In terms of technology, wich of the four devices is the most recent?
a. keyboard
b. joystick
c. scanner
d. camera
3 Negative ways of using the Internet
Answer:
1. It rots the mind of children
2. It's to too addicting
3. can show bad things.
Explanation:
Please help me with my question
Answer:
1. Template
2. Name of the website
3. Signature of the instructor
Which headphones are a better option, the HyperX Cloud Stinger or the Logitech G432
Answer:
The Logitech ones.
Explanation:
Surprisingly I've used all 3 of them and the Logitech ones are the one with not only the best sound quality. And the mic isn't horrible either.
An input value has to be greater than 18 and less than 65 if a driving license is to be approved for issue. What type of input checking is appropriate?
Answer:
You should use an "if" statement to check whether the number is greater than 18 or less than 65.
Explanation:
You usually use "if" statements whenever you want to compare a number to another. Keep in mind that "if" statements are not only used for comparison!
5.2
Explain ONE reason why the special equipment is used when
testing eyesight for a driver's licence.
(2)
Answer:
In order to reduce the risk of accidents on the roads.
Explanation:
The special equipment is used when testing eyesight for a driver's license in order to reduce the risk of accidents on the roads. Good eyesight is very important for good and safe driving so to find out the eyesight of the driver, the license officer used special equipment in order to check driver's eyes. If the eyesight is good, the officer provide license to the person otherwise not so that no accidents happen on the road.
What do you call a commercial transaction beyween a buisness and buisness thatis transactedd online?
A.B2B - commerce
B.B2.B commerce
C. B2b digital transaction
D.B2B e - commerce
E. Non of the above
Answer:
c.B2b digital transaction
Explanation:
yan lang po sana makatulong
Which option is not available in the Presenter view of a presentation?
Group of answer choices.
A. Next Slide Preview
B. Pen/Laser Pointer tools
C. Open Slide Show
D. Navigation Controls
Answer:
C. Open Slide Show
Explanation:
PowerPoint application can be defined as a software application or program designed and developed by Microsoft, to avail users the ability to create various slides containing textual and multimedia informations that can be used during a presentation.
Some of the features available on Microsoft PowerPoint are narrations, transition effects, custom slideshows, animation effects, formatting options etc.
Basically, the views that are available on the Microsoft PowerPoint application includes;
1. Slide Sorter.
2. Notes Page.
3. Reading Pane.
4. Presenter view.
Presenter view avails the user an ability to use two monitors to display his or her presentation. Thus, one of the monitors displays the notes-free presentation to your audience while the other monitor lets you view the presentation with notes that you have added to the slides, as well as the navigation and presentation tools.
Furthermore, the Presenter view was developed by Microsoft Inc. to have the following options;
I. Next Slide Preview.
II. Pen/Laser Pointer tools.
III. Navigation Controls.
However, Open Slide Show is an option which is not available in the Presenter view of a presentation.
what type of computer system can be found in the computer lab at school?
A. mini
B. micro
C. Mainframe
D. super
Answer:
B: micro
Explanations
a small computer that contains a microprocessor as its central processor.
