QUESTION 11 POINT

The scatter plot below shows data relating total income and the number of children a family has. Which of the following patterns does the scatter plot show?

The horizontal x axis represents the Number of children and ranges from 0 to 7, in increments of 1. The vertical y axis represents Income in thousands, and ranges from 0 to 200, in increments of 50. The coordinates of the points are as follows: (1, 100), (1, 150), (2, 50), (2, 200), (3, 100), (3, 150), (4, 50), (4, 100), (5, 150), (5, 200), (6, 50), (6, 200), (7, 100) and (7, 150).

Select the correct answer below:

Positive linear pattern

Positive linear pattern with deviations

Negative linear pattern

Negative linear pattern with deviations

No pattern

QUESTION 21 POINT

A researcher claims that the proportion of cars with manual transmission is less than10%. To test this claim, a survey checked1000randomly selected cars. Of those cars,95had a manual transmission.

The following is the setup for the hypothesis test:

{H0: p=0.10

Ha: p<0.10

Find the test statistic for this hypothesis test for a proportion. Round your answer to2decimal places.

Provide your answer below:

Test Statistic=

QUESTION 31 POINT

A medical experiment on tumor growth gives the following data table.

x	y
41	36
43	50
56	87
79	98
114	142

The least squares regression line was found. Using technology, it was determined that the total sum of squares (SST) was7019.2and the sum of squares of regression (SSR) was6503.8. CalculateR2, rounded to three decimal places.

Provide your answer below:

QUESTION 4

Lisa has collected data to find that the number of pages per book on a bookshelf has a normal distribution. What is the probability that a randomly selected book has fewer than145pages if the mean () is195pages and the standard deviation () is25pages? Use the empirical rule. Enter your answer as a percent rounded to two decimal places if necessary.

Provide your answer below:

------%

QUESTION 51 POINT

Find the linear regression line for the following table of values. You will need to use a calculator, spreadsheet, or statistical software.

Enter your answer in the formy=mx+b, withmandbboth rounded to two decimal places.

x	y
1	3.76
2	9.76
3	11.23
4	11.1
5	13.6
6	17.76

Provide your answer below:

y= x+

QUESTION 61 POINT

A random sample of adults were asked whether they prefer reading an e-bookover a printed book. The survey resulted in a sample proportion ofp=0.14, with a sampling standard deviation ofp=0.02, who preferred reading an e-book.

Use the empirical rule to constructa95%confidence interval for the true proportion of adults who prefer e-books.

Provide your answer below:

(, )

QUESTION 71 POINT

A fitness center claims that the mean amount of time that a person spends at the gym per visit is33minutes. Identify the null hypothesis,H0, and the alternative hypothesis,Ha, in terms of the parameter.

Select the correct answer below:

H0:33;Ha:=33

H0:=33;Ha:33

H0:33;Ha:<33

H0:33;Ha:>33

QUESTION 81 POINT

Which of the following results in the null hypothesis38and alternative hypothesis<38?

Select the correct answer below:

A fitness center claims that the mean amount of time that a person spends at the gym per visit is at most38minutes.

A fitness center claims that the mean amount of time that a person spends at the gym per visit is fewer than38minutes.

A fitness center claims that the mean amount of time that a person spends at the gym per visit is38minutes.

A fitness center claims that the mean amount of time that a person spends at the gym per visit is more than38minutes.

QUESTION 91 POINT

The population standard deviation for the heights of dogs, in inches, in a city is3.7inches. If we want to be95%confident that the sample mean is within2inches of the true population mean, what is the minimum sample size that can be taken?

z0.10 1.282, z0.05 1.645, z0.0251.960, z0.012.326, z0.005 2.576

Use the table above for thez-score and be sure to round up to the nearest integer.

Provide your answer below:

dog heights=

QUESTION 101 POINT

A researcher is interested in whether the variation in the size of human beings is proportional throughout each part of the human. To partly answer this question they looked at the correlation between the foot length (in millimeters) and height (in centimeters) of30randomly selected adult males. The data is provided below. Use Excel to calculate the correlation coefficientrbetween the two data sets. Round your answer to two decimal places.

Foot length (mm) Height length (cm)

240.2 145.7

241.3 135.7

242.5 155.7

243.8 125.7

244.9 115.7

255.3 145.3

256.9 135.3

217.5 155.3

258.4 125.3

r=