# ACCOUNTING

 Question 30 of 40 0.0/ 2.5 Points

A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She desires a margin of error of \$30. Past studies suggest that a population standard deviation of \$248 is reasonable. Estimate the minimum sample size needed to estimate the population mean with the stated accuracy.

 [removed] A. 274 [removed] B. 284 [removed] C. 264 [removed] D. 272
 Question 31 of 40 0.0/ 2.5 Points

Select the best fit line on the scatter diagram below.

 [removed] A. A [removed] B. B [removed] C. C [removed] D. All of the lines are equally good
 Question 32 of 40 2.5/ 2.5 Points

Eleven female college students are selected at random and asked their heights. The heights (in inches) are as follows:

67, 59, 64, 69, 65, 65, 66, 64, 62, 64, 62

Estimate the mean height of all female students at this college. Round your answer to the nearest tenth of an inch if necessary.

 [removed] A. It is not possible to estimate the population mean from this sample data [removed] B. 64.3 inches [removed] C. 64.9 inches [removed] D. 63.7 inches
 Question 33 of 40 2.5/ 2.5 Points

Among a random sample of 500 college students, the mean number of hours worked per week at non-college related jobs is 14.6. This mean lies 0.4 standard deviations below the mean of the sampling distribution. If a second sample of 500 students is selected, what is the probability that for the second sample, the mean number of hours worked will be less than 14.6?

 [removed] A. 0.5 [removed] B. 0.6179 [removed] C. 0.6554 [removed] D. 0.3446
 Question 34 of 40 2.5/ 2.5 Points

A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 560 college students showed that 27% of them had, or intended to, cheat on examinations. Find the 95% confidence interval.

 [removed] A. 0.2323 to 0.3075 [removed] B. 0.2325 to 0.3075 [removed] C. 0.2325 to 0.3185 [removed] D. 0.2323 to 0.3185
 Question 35 of 40 0.0/ 2.5 Points

Select the best estimate of the correlation coefficient for the data depicted in the scatter diagram.

 [removed] A. -0.9 [removed] B. 0.9 [removed] C. 0.5 [removed] D. -0.5
 Question 36 of 40 2.5/ 2.5 Points

Monthly incomes of employees at a particular company have a mean of \$5954. The distribution of sample means for samples of size 70 is normal with a mean of \$5954 and a standard deviation of \$259. Suppose you take a sample of size 70 employees from the company and find that their mean monthly income is \$5747. How many standard deviations is the sample mean from the mean of the sampling distribution?

 [removed] A. 0.8 standard deviations above the mean [removed] B. 0.8 standard deviations below the mean [removed] C. 7.3 standard deviations below the mean [removed] D. 207 standard deviations below the mean
 Question 37 of 40 2.5/ 2.5 Points

A sample of nine students is selected from among the students taking a particular exam. The nine students were asked how much time they had spent studying for the exam and the responses (in hours) were as follows:

18, 7, 10, 13, 12, 16, 5, 20, 21

Estimate the mean study time of all students taking the exam. Round your answer to the nearest tenth of an hour if necessary.

 [removed] A. 13 hours [removed] B. 12.2 hours [removed] C. 13.6 hours [removed] D. It is not possible to estimate the population mean from this sample data
 Question 38 of 40 0.0/ 2.5 Points

The scatter plot and best-fit line show the relation between the price per item (y) and the availability of that item (x) in arbitrary units. The correlation coefficient is -0.95. Determine the amount of variation in pricing explained by the variation in availability.

 [removed] A. 5% [removed] B. 10% [removed] C. 95% [removed] D. 90%
 Question 39 of 40 2.5/ 2.5 Points

Sample size = 400, sample mean = 44, sample standard deviation = 16. What is the margin of error?

 [removed] A. 1.4 [removed] B. 1.6 [removed] C. 2.2 [removed] D. 2.6
 Question 40 of 40 2.5/ 2.5 Points

The graph shows a measure of fitness (y) and miles walked weekly. Identify the probable cause of the correlation.

 [removed] A. The correlation is coincidental. [removed] B. There is a common underlying cause of the correlation. [removed] C. There is no correlation between the variables. [removed] D. Walking is a direct cause of the fitness.

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