A random sample of 16 men was selected from the population of ISU students. The sample's average BMI value was 22.5 with a standard deviation of 4.8. Create a 99% confidence interval for the mean of the population of male student.

During the past year, the flight times between two cities was reported to have a population standard deviation of 20 minutes.  What would the margin of error be if a sample of 64 was used for estimating the mean flight time between the two cities and with a confidence level of 95%

An SRS of 29 students at HCC gave an average height of 5.5 feet and a standard deviation of .1 feet. Construct a 90% confidence interval for the mean height of students at HCC.

You have obtained the number of years of education from one random sample of 38 police officers from City A and the number of years of education from a second random sample of 30 police officers from City B. The average years of education for the sample from City A is 15 years with a standard deviation of 2 years. The average years of education for the sample from City B is 14 years with a standard deviation of 2.5 years. Is there a statistically significant difference between the education levels of police officers in City A and City B?What is the appropriate test for this case? 2 sample z-testChi-square test     2-sample t-test2 sample paired t-test Carry out the test. The test statistic =   (round answer to two decimal places.)and the p-value is   (round answer to 2 decimal places)There     sufficient evidence at the 5% level to conclude that the education levels of police officers in City A and City B is significantly different.