The Center for the Display of Visual Arts wants to know whether its parking situation is...

The Center for the Display of Visual Arts wants to know whether its parking situation is getting worse. Specifically, administrators are concerned that a lack of parking is driving away potential visitors. The administrators plan to address the situation if at least 15% of visitors feel that finding parking near the facility is a problem (the center averages about 3,100 visitors per week). To get a sense of whether this is really the case, the administrators distribute a brief exit survey to 150 individuals who visit the center over the following week. The results indicate that 32 of 150 visitors complained about being unable to find adequate parking. Present a hypothesis and null hypothesis. Calculate a t score and use it to evaluate the hypotheses. What should the administrators conclude from these results?

Expert Solution

orchestra answered 1 year ago

A rich donor has approached a small liberal arts college and wants to know what the...

A rich donor has approached a small liberal arts college and wants to know what the total of all of the student debt at the college is. She is considering paying off every student’s debt, but needs to know how much that is before she publicly announces her plan. In response, the school decides to conduct a survey of its students to find out what the total of all students’ debt is. They want to be sure that in-state, out-of-state,...

A consumer organization wants to know whether there is a difference in the price of a...

A consumer organization wants to know whether there is a difference in the price of a particular toy at three different store types. The price of the toy was checked in a sample of five discount stores, five variety stores, and five department stores. The sample results and the excel output are shown below: Discount Variety Dept. 12 15 19 13 17 17 14 14 16 12 18 20 15 17 19 Anova: Single Factor SUMMARY Groups Count Sum Average...

Post a situation in which it might be interesting to know whether a difference in variances...

Post a situation in which it might be interesting to know whether a difference in variances exists. Why would it be important to know if a difference exists. What actions might result if differences are or aren't found?

An advertising company wants to know whether the size of an advertisement and the color of...

An advertising company wants to know whether the size of an advertisement and the color of the advertisement make a difference in the response of magazine readers. A random sample of readers shown ads of 4 different colors and 3 different sizes. Assume that the ratings follow the normal distribution. The rating is shown in the following table: Size of Ad Color of Ad Red Blue Orange Green Small 4 3 3 8 Medium 3 5 6 7 Large 6...

A proponent of a new proposition on a ballot wants to know whether the proposition is...

A proponent of a new proposition on a ballot wants to know whether the proposition is likely to pass. The proposition will pass if it gets more than 50% of the votes. Suppose a poll is taken, and 560 out of 1000 randomly selected people support the proposition. Should the proponent use a hypothesis test or a confidence interval to answer this question? Explain. If it is a hypothesis test, state the hypotheses and find the test statistic, p-value, and...

To benchmark their performance against competing healthcare institutions, a radiology center wants to know the average...

To benchmark their performance against competing healthcare institutions, a radiology center wants to know the average time taken by their staff to do an MRI test. A sample of 50 randomly selected MRI tests yielded a sample average of 47 minutes and a sample standard deviation of 9 minutes. The distribution of testing time, however, is highly skewed to the right. Suggest a plausible reason for the distribution of the MRI testing time to be right skewed. Why can one...

8. (18 pts) A study wants to know whether there is a difference in objection to...

8. (18 pts) A study wants to know whether there is a difference in objection to sharing information among the three groups of customers: customers of insurance companies, customers of pharmacies and customers of medical researchers. A sample of customers is selected for each group and the results are as follows: Organizational Grouping Object to Sharing Information Insurance Pharmacies Research Total Yes 40 80 90 210 No 160 120 110 390 Total 200 200 200 600 At the α =...

A financial advisor wants to know whether there is a significant difference between the NYSE and...

A financial advisor wants to know whether there is a significant difference between the NYSE and NASDAQ markets in the annual dividend rates for preferred stocks. A sample of 30 returns is selected from each market. Assume the two samples are random and independent. Test the claim that there is no difference in the annual dividend rates for the two markets. Use α = 0.05. Expaln how you computed the sample means and standard deviations. Suggestion: use Excel NASDAQ 2.00...

A coffee shop in Victoria wants to know whether there is a significant difference between the...

A coffee shop in Victoria wants to know whether there is a significant difference between the number of lattes sold per day at their Yates St. location and their Johnson St. location. A sample of 31 days at their Yates St. location reveals an average of 22 lattes sold per day with a standard deviation of 5 lattes. A sample of 31 days at their Johnson St. location reveals an average of 19 lattes sold per day with a standard...

A forensic pathologist wants to know whether there is a difference between the rate of cooling...

A forensic pathologist wants to know whether there is a difference between the rate of cooling of freshly killed bodies and those which were reheated, to determine whether you can detect an attempt to mislead a coroner about time of death. He tested several mice for their "cooling constant" both when the mouse was originally killed and then after the mouse was re-heated. Here are the results: Mouse Freshly killed Reheated 1 573 481 2 482 343 3 377 383...

Question