University at Buffalo claims that the average wait time to meet with counseling services 15 days. A random survey of 75 students currently waiting for services revealed that the average wait time is 17 days with a standard deviation of 6.5 days. Conduct a hypothesis to test the state UB's claim. What type of test should be run? Oztest of a proportion t-test of a mean Oz-test for a mean Ot-test for a proportion The alternative hypothesis indicates a Oright-tailed test O left-tailed test O two-tailed test Calculate the p-value (rounded to at least 4 decimal places)

A group of 49 randomly selected students has a mean age of 22.4 years. Assume the population standard deviation is 3.8. Construct a 90% confidence interval for the population mean. Include a statement interpreting your answer.

Fuel efficiency of Prius:  Fueleconomy.gov, the official US government source for fuel economy information, allows users to share gas mileage information on their vehicles. The histogram below shows the distribution of gas mileage in miles per gallon (MPG) from 14 users who drive a 2012 Toyota Prius. The sample mean is 53.3 MPG and the standard deviation is 5.2 MPG. Note that these data are user estimates and since the source data cannot be verified, the accuracy of these estimates are not guaranteed. (a) The EPA claims that a 2012 Prius gets 50 MPG (city and highway mileage combined). Do these data provide strong evidence against this estimate for drivers who participate on fueleconomy.gov? The test statistic is: __________________(please round to two decimal places)The p-value:___________________________ for this hypothesis test is:  (please round to four decimal places)(c) Please comment on the primary thing that is wrong about the following statement: There is sufficient evidence…

A . please do not uplod handwritting image ( only typing please)

Ohio is surveying the price of nitrogen, which is necessary for many manufacturing processes. The state surveyed 60 stores across the state; the mean price is $0.31 per pound, and the standard deviation is $0.05. The confidence level is 95%. What is the margin of error? O 0.0125 O 0.0127 O 0.0129 O 0.0131

1 Jump to level 1 A pipes manufacturer makes pipes with a length that is supposed to be 11 inches. A quality control technician sampled 32 pipes and found that the sample mean length was 11.09 inches and the sample standard deviation was 0.2 inches. The technician claims that the mean pipe length is not 11 inches. What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 20 Does sufficient evidence exist at the a= 0.05 significance level to support the technician's claim? Select Check HIN 60°F

It is suggested that the mean one-day travel expense by tourists in Moscow is $500 (assume all one-day travel expenses in Moscow are approximately normally distributed).  In a random sample of 16 Moscow tourists, the sample mean one-day travel expense was $482 with a sample standard deviation s = 22.5.  Our goal is to test whether or not the mean one-day travel expense is $500 or not.   Determine the value of the appropriate test statistic to perform this test. Do not round. Note:  the standard deviation of all one-day travel expenses in Moscow is unknown.  This is why  we must use the t-distribution instead of the standard normal distribution.

A poll asked whether states should be allowed to conduct random drug tests on elected officials. Of 21,327 respondents, 56% said "yes." a. Determine the margin of error for a 99% confidence interval. b. Without doing any calculations, indicate whether the margin of error is larger or smaller for a 90% confidence interval. Explain your answer. Click here to view page 1 of the table of areas under the standard normal curve. Click here to view page 2 of the table of areas under the standard normal curve. a. The margin of error for a 99% confidence interval is (Round to three decimal places as needed.) b. Without doing any calculations, indicate whether the margin of error is larger or smaller for a 90% confidence interval. A. The margin of error will be smaller for a 90% confidence interval. B. The margin of error will be about the same for a 90% confidence interval. C. The margin of error will be larger for a 90% confidence interval. D. There is insufficient information to determine the…

An article reports that blue eyed people earn less than brown eyed people. Average blue eyed salary, $35,000, average brown eyes $37,000, p-value 0.45. Based on that reported p-value and using the common definition of "statistical significance" which is the case?