ap stat review

which of the following is used to display categorical data?

• stem plot

• histogram

• bar graph

• dot plot

when the mean is greater than the median, what is the shape of the distribution?

• roughly symmetric

• skewed left

• skewed right

A random sample of 10 students were surveyed from a middle school to see how many pencils each student had. Here is the data:

5 8 3 6 9 2 7 8 4 3

Find the IQR

• 5

• 8

• 6

• 2

is the standard deviation of the sample a resistant measure of variability?

• yes

• no

out of the following answers below, which of them are incorrect about the empirical rule?

• about 99.7% of the observations fall within 3 SDs of the mean

• about 98% of the observations fall within 3 SD of the mean

• about 98.9% of the observations fall within 3 SDs of the mean

• about 97% of observations fall within 3 SDs of the mean.

is the mean or median resistant to outliers?

• mean

• median

using table a, what percent is a z score of 1.98?

• 97.06%

• 97.61%

• 97.67%

• 96.99%

when adding or subtracting a constant, which of the following is correct?

• does change IQR

• does not add/subtract from mean

• does not change range

• does change shape

what is the area underneath a density curve?

which of the following characteristics do we not look for in scatterplots?

• strength

• direction

• symmetry

• form