Comparing Samples

There is more variability in the number of days that Team A members trained because the IQR for Team A is greater than the IQR for Team B.

There is more variability in the number of days that Team B members trained because the IQR for Team B is greater than the IQR for Team A.

Team A members generally trained for more days than Team B members

Team B members generally trained for more days than Team A members

The 1st period mean is 35. The 2nd period mean is 38.75. On average, it took students in the 1st period class slightly longer to finish their homework than it did the students in the 2nd period class.

The 1st period mean is 38.75. The 2nd period mean is 35. On average, it took students in the 1st period class slightly longer to finish their homework than it did the students in the 2nd period class.

The 1st period mean is 35. The 2nd period mean is 38.75. On average, it took students in the 2nd period class slightly longer to finish their homework than it did the students in the 1st period class.

The 1st period mean is 38.75. The 2nd period mean is 35. On average, it took students in the 2nd period class slightly longer to finish their homework than it did the students in the 1st period class.

Reject Ho, there is a significant difference

Fail to reject Ho, there is NOT a significant difference

Reject Ho, there is NOT a significant difference

Accept Ho, there is a significant difference

A) 5 red shirts

B) 17 red shirts

C) 40 red shirts

D) 83 red shirts

14 7th graders

28 7th graders

35 7th graders

42 7th graders

On average, most participants caught and released 5 or more fish.

More participants caught 6 fish than any other number.

The same participants who caught and released 1 fish the first day caught and released 1 fish on the second day.

On average, participants caught and released more fish on Day 2.

The median for the fruit data is 100. The median for the vegetable data is 50. Fruits have a higher number for calories with greater variation.

The median for the fruit data is 50. The median for the vegetable data is 100. Fruits have a higher number of calories with greater variation.

The median for the fruit data is 100. The median for the vegetable data is 50. Vegetables have a higher number of Calories with a greater variation.

The median for the fruit data is 100. The median for the vegetable data is 50. Fruits have a higher number for calories with less variation.

Group 1 has a greater median number of hours that they watched television. Group 1 has a smaller IQR, so the data is less spread out.

The mean for group 2 is larger than the mean for group 1.

The median for group 2 is larger than the median for group 1.

Both sets of data are symmetric. You should use the mean to compare the measures of center.