4.6 4.6 4.3 4.6 2.8 4.7 3.6 4.2 4.3 4.3 4.6 4.3 3 3.4
4.6 3.3 4.6 4.3 4.7 3.6 4.2 4.3 4.3 4.6 4.3 3.0 3.4
a) Construct a 95% confidence interval for the audit fees.
b) Based on part (a), can you determine if the average auditing fees have changed?

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Question 72

1) What is the approximate rank for the campus having around 150 engineering faculty? - About 5 - About 20 - About 80 2) Looking at the overall trend, would another campus in the UC system with 100 engineering faculty likely have a better or worse rank than the campus with around 150 engineering faculty? - better - worse

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Question 73

Texts: The following data represent the sales price in dollars for nine used hybrid automobiles in the Los Angeles area.

11, 050

15,799

8, 499

7,395

8, 690

7,998

6, 889

5,900 $6,200 a) Use the appropriate command in your calculator to find the five-number summary for this sample. Minimum = Q1 = Median = Q3 = Maximum = b) Calculate the Upper Boundary for the data set. Give the calculation and values you used as a way to show your work. Give your final answer for the Upper Boundary. c) Are there any Upper Outliers? If yes, type yes and the value of any upper outliers. If no, type no.

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Question 74

Two physicians in a department of emergency medicine reviewed the medical records of patients admitted for diabetic crisis to the hospital in the last 5 years. They correlated several different variables, such as length of hospital stay, survival, cost of care, re-hospitalizations, age, race, family history, and so forth. If they found any statistically significant trends (p-values of 0.05 or less), they planned to publish those results, and they planned to ask a statistician to help them determine if any of their correlations are significant. Do you see any potential methodological or ethical problems with this study design? Would it be ethical for the researchers to publish their results if they do not make it clear in the paper that they have mined the data for specific trends? Would you be more confident in their research if they had a hypothesis prior to conducting the study? Why?

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Question 75

Texts: 1308J55.6.7 Question 12 of 15 (point |Question Attempt 1 of 1) Espalet The mean SAT score in mathematics is 572. The standard deviation of these scores is 40. A special preparation course claims that the mean SAT score of its graduates in mathematics for the sample was 586. At the 0.05 level of significance, can we conclude that the population mean SAT score for graduates of the course is greater than 572? Assume that the population standard deviation of the scores of course graduates is also 40. Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. If necessary, consult a statistical formulas. a) State the null hypothesis and the alternative hypothesis. H0: μ ≤ 572 Ha: μ > 572 b) Determine the type of test statistic to use. Choose one (c). Find the value of the test statistic. (Round to three decimal places.) P Do 8 Den d) Find the p-value. (Round to three or more decimal places.) e) Can we support the preparation course's claim that the population mean SAT score of its graduates is greater than 572? Yes or No Submit Assignment MacBook Air

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Question 76

Text: Type 1 error occurs when?

We reject Ho if it is True
We reject Ho if it is False
We accept Ho if it is True
We accept Ho if it is False

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Question 77

While reviewing the sample of audit fees, a senior accountant for the firm notes that the fee charged by the firm's accountants depends on the complexity of the return.A comparison of actual charges therefore might not provide the information needed to set next year's fees. To better understand the fee structure, the senior accountant requests a new sample that measures the time the accountants spent on the audit. Last year, the average hours charged per client audit was 2.97 hours. A new sample of 15 audit times shows the following times in hours. Complete parts a and b below. 4.6 3.1 3.4 4.7 3.2 3.5 4.5 3.8 3.1 4.2 4.9 3.4 3.2 3.4 4.8

a) Assume the conditions necessary for inference are met.Find a 99% confidence interval for the mean audit time
The 99% confidence interval to estimate the mean audit time is fromto Round to two decimal places as needed.)
b Based on your answer to part a,do you think that the audit times have,in fact,increased? A.Since the population mean,2.97.is contained B.Since the population mean.2.97.is below the 99% within the 99% confidence interval,it can be said confidence interval,it can be said with 99% with 99% confidence that the mean audit time has confidence that the mean audit time has increased increased.
O C.Since the population mean,2.97,is above the D.Since the population mean,2.97.is contained 99% confidence interval,it can be said with 99% within the 99% confidence interval,it can be said confidence that the mean audit time has increased with 99% confidence that the mean audit time has not increased

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Question 78

6.4pts) Approximately 11.7% of high school students drop out of school before graduation Suppose 10 students entering high school are selected at random. Find the probability that

a No more than 2 students drop out
b) At least 8 students graduate
c All 10 students stay in school and graduate
dAll 10 students drop out

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Question 79

Please assist with the problems with a red x by it.

The following n=10 observations are a sample from a normal population: 7.47, 0.657, 7.47, 5.6, 3.6, 9.7, 7.76, 5.7, 0 (a) Find the mean and standard deviation of these data. Round your standard deviation to four decimal places. X standard deviation = 0.3851
State the conclusion.
@H is not rejected. There is insufficient evidence to conclude that the mean is less than 7.5. H is rejected. There is sufficient evidence to conclude that the mean is less than 7.5. OH. Is not rejected. There is sufficient evidence to conclude that the mean is less than 7.5. O Hg is rejected. There is insufficient evidence to conclude that the mean is less than 7.5.
Do the results of part b support your conclusion in part c? Yes x, No x

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Question 80

Question 5 (1 point): A research survey sampled adults and teenagers and asked each whether they preferred to drink plain bottled water or sports drinks after exercising. Suppose 200 adults and 200 teenagers participated in the study, and 280 reported they preferred plain bottled water. Of the group preferring sports drinks, 80 were adults and 40 were teenagers. Given that a consumer likes a sports drink, what is the probability that they are a teenager? 0.33 0.428 0.583 0.2

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