1/1 75% 16. Ages of College Students The dean of students wants to see whether there is a significant difference in ages of res- ident students and commuting students. She selects a ran- dom sample of 50 students from each group. The ages are shown here. At a = 0.05, decide if there is enough evi- dence to reject the claim of no difference in the ages of the two groups. Use the P-value method. Assume o = 3.68 and oz = 4.7. Resident students 22 25 18 19 26 22 19 25 20 30 19 19 21 27 26 26 18 19 19 23 24 18 29 21 21 26 27 18 19 23 21 28 26 19 22 18 22 26 18 32 18 20 18 24 19 23 22 18 20 23 Commuter students 18 23 26 19 29 20 20 20 18 30 26 23 21 25 22 25 19 23 22 35 21 18 22 22 19 19 19 24 20 18 19 27 19 35 24 20 28 22 19 36 23 25 21 18 27 20 32 20 18 19

Using the same question from #3 A survey is done to find out the favorite movies of 500 children.  The children are categorized into male and female, and a sample of 50 children is chosen. Answer the following question: If the number of female children is 300, what is the sample size of each stratum?   a male sample: 40 and female sample: 10  b male sample; 25 and female sample: 25 c male sample: 30 and female sample: 20 d male sample: 20 and female sample: 30

You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 90% confident that the sample percentage is within 1.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. n= (Round up to the nearest integer.) nter corr

There are 150 members of the senior class. You survey 25 members of the class randomly and 22 say they are going to attend the dance. How many seniors are likely to be at the dance?

USE EXCEL to solve this problem. Thanks.

Hans plays a game when he exercises. He chooses a marble from a bag of three marbles: one is blue, one is red, and one is green. Based on the marble he chooses, he completes a certain number of push-ups, as shown below. Marble Number of push-ups blue red green 10 Consider choosing a marble like sampling from a population. (The population mean of the number of push-ups is u=9.00 and the population standard deyiation is o =0.82.) (a) Suppose a sample of size 2 is randomly selected from the population, with replacement, as follows. One marble is randomly chosen, the number of push- ups is completed, and the marble is put back into the bag. Then for a second time a marble is randomly chosen and the number of push-ups is completed. There are 9 possible samples. The numbers of push-ups for several of the possible samples have been listed in the table below. Enter the numbers of push-ups for the remaining possible samples. When you are done, select "Compute". In the "Sample mean, x" column,…