Question 1

Data Set “Marriage vs The Economy”

Solution: There is a negative correlation between “Median Hourly Wages” and “# of marriages”

Question 2

Match the following scatter plots A, B and C to linear correlation coefficient values, r = – 0.97, 0.41 or 0.83 .

Scatter Plot A

Scatter Plot B

Scatter Plot C

Question 3

1. If we had data that displayed **very strong negative correlation**, we would expect to get a **linear correlation coefficient** “close” to what integer?

2. If we saw a scatterplot that had **very strong positive correlation**, with all of the data values very very close to the regression line, we would expect to have **residuals** that are “close” to what integer?

Question 4

In StatCrunch, open the shared data set **Absences vs Grade (Marks)**, owned by **mortensenn**. Perform a linear regression analysis using using **Absences** as the **explanatory variable** and **Grade (Marks)** as the response variable.

a) Give the correlation coefficient. Round your answer to two decimal places.

b) Give the amount of variation in **Grade** that is explained by **Absences**. %. Give your answer as a percent rounded to two decimal places. (Be sure you do your rounding only after you convert to a percent).

c) By what amount do we expect the Grade to vary from what is predicted by the regression equation? Give your answer rounded to two decimal places.

d) Predict the Grade for someone with 3 absences using this model. Round your answer to two decimal places.

f) Give a number of absences that shouldn’t be used for a predictor with this model.

Question 5

In StatCrunch, open the data set titled **Galton Data** owned by **msullivan13803**. Perform a linear regression analysis using the column **Father** as the **explanatory variable** and **Son** as the **response variable**. This will use the Father’s height as a predictor for the sons height.

a) Give a statement to interpret the slope of the regression equation.

b) Should this linear regression regression model be used to predict the height of a Son using that of the Father? Why or why not?

Give your answer here in Canvas if you will keyboard, or on a document to submit if you will write by hand.

Question 6

What is the probability that **someone who ****Has NOT Received**** at least one dose of a Covid-19 Vaccine** identified as __ White__? Give the numerator and denominator of the fraction that will identify this probability.

Numerator (top) =

Denominator (bot) =

Question 7

Consider the following partially completed Two-Way Table.

Identify with the Democratic Party

Do Not Identify with the Democratic Party

Age: Millennial (Ages 24 – 39)

A

B

C. 220,000

Age: Not a Millennial

D

E

F. 780,000

G. 330,000

H. 670,000

I. 1,000,000

Use the following information to find the value of box B.

A recent Pew Research Poll, June 2, 2020, Reveals the 46% of **Millennials **DO NOT Identify with the Democratic Party.

Question 8

Suppose the random variable X = The number of times I have gone out to get afternoon coffee in a week.

Is X a discrete or continuous random variable?

Group of answer choices

Continuous

Discrete

Question 9

Suppose the random variable X = weight of a students backpack.

Is X a discrete or continuous random variable?

Group of answer choices

Discrete

Continuous

Question 10

A. As an event gets more and more likely, the probability of that event gets closer and closer to . (Enter an integer.)

B. As an event gets less and less likely, the probability of that event gets closer and closer to . (Enter an integer).

C. Suppose the probability of an event is .014, we expect that event to happen about what percent of the time? % (Enter a number to one decimal place.)

D. Suppose the probability of an event is .2413. If we conducted 100 trials of the corresponding probability experiment, we would expect this even to happen about how many times out of the 100 trials. (Enter an integer)

Question 11

The following table shows the probability distribution for X = Number of coffee drinks bought per week per student during one semester at a community college. Find the missing value to complete the table.

P(X = 3) =

Question 12

In StatCrunch, load the shared data set **Sweet Treats** owned by **slohse**. The data table gives a Discrete Probability Distribution for the number of Sweet Treats purchased per week, along with their corresponding probabilities.

A. It would be **unusual** that I would buy how many sweet treats?

B. What is the probability of buying 2 or fewer sweet treats?

C. What is the probability of buying 3 or more sweet treats?

D. Which is more likely? B = buying 2 or fewer sweet treats or C = buying 3 or more sweet treats? (Answer either B or C)

**Question 13**

**Rabbit weights** have a mean of 12 lbs and a standard deviation of 2 lbs.

Answer the following questions regarding z-scores. (Note – you shouldn’t need a formula to get any of these answers, just an understanding of what a z-score represents.)

A. What would be the z-score for a rabbit weight of 12 lbs? z = (Enter an integer)

B. What would be the weight for a rabbit with a z-score of -1? Weight= (Enter an integer)

C. What would be the z-score for a rabbit weight of 8 lbs? z = (Enter an integer)

Question 14

Consider the following normal distribution and answer the question below. Assume horizontal axis is standard, with numbered values corresponding to z-scores of -3, -2, -1, 0, 1, 2, 3.

What is the mean of the data set represented in this distribution? .

What is the standard deviation of the data set represented in this distribution?

According to this distribution, is an outcome near 6 or 1 more likely?

Question 15

Data analysis of the StatCrunch shared data set containing characteristics of cereal shows that the variable **Calories per Serving** follows a roughly bell-shaped curve, with a mean of 106.9 calories and a standard deviation of 19.5 calories.

a) Find the probability that a randomly selected cereal has less than 100 calories per serving. Give your answer to four decimal places.

b) Find the probability that a randomly selected cereal has between 100 and 130 calories. Give your answer to four decimal places.

c) Which is **more likely**, to select a cereal that has A = less than 100 calories, or B= between 100 and 130 calories? Answer A or B

Graduatewriterhelp.com is an online academic writing site catering to students from all educational levels, from high school and college to graduate level and beyond. The website has a team of experienced writers who are equipped with the knowledge and skills required to provide top-notch custom writing services for any task assigned by our customers.

At Graduatewriterhelp.com, we specialize in offering assistance with the following tasks: essays, research papers, projects, case studies, book reviews, lab reports, presentations, term papers and even editing or proofreading services as well. All these tasks can be done according to the instructions provided by our clients without compromising on the quality or accuracy of work delivered within shorter periods of time as per customer requirements. Clients also have access to knowledgeable customer support staff, which assists them with their queries at any time during the day or night when placing orders through our website interface.

In addition to the regular services offered by Graduatewriterhelp.com such as essay writing help for high school and college assignments; dissertation/thesis preparation for postgraduate programs; coursework composition for undergraduates; editing/proofreading services for students who require revisions on pre-written works; we also offer specialized services like grant proposal writing assistance for those seeking funds from external bodies; data analysis report creation based on statistical information collected from relevant sources; CV/resume formatting according to employer expectations; literature reviews postulating various interpretations on certain topics etcetera based on customer needs..

We also facilitate the completion of important applications such as those needed while applying abroad or enrolling into some universities where thoroughness is critical in order secure admissions favorably that meet admission criteria demandingly set forth by these institutions due to intense competition witnessed globally today among prospective applicants vying places available therein limited vacancies so created thereupon every academic year…

Moreover, our experts are qualified in diverse fields being well versed in different areas of knowledge too, thus enabling us to cover almost any topic that may come your way thereby providing comprehensive solutions pertaining same conclusively efficient manner possible, meeting customer deadlines within the desired timeframe successfully sans excuses whatsoever implicated concerning inconsistency matters grade expectation meeting provided via us hereunder…

By availing our services at Graduatewriterhelp.com, clients can rest assured that their work will be completed accurately within their specified deadlines without compromising quality standards expected out of professional service providers like ourselves.

The price is based on these factors:

Academic level

Number of pages

Urgency

Basic features

- Free title page and bibliography
- Unlimited revisions
- Plagiarism-free guarantee
- Money-back guarantee
- 24/7 support

On-demand options

- Writer’s samples
- Part-by-part delivery
- Overnight delivery
- Copies of used sources
- Expert Proofreading

Paper format

- 275 words per page
- 12 pt Arial/Times New Roman
- Double line spacing
- Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Delivering a high-quality product at a reasonable price is not enough anymore.

That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more