Prob and Stat Review

The data set below has an outlier of 42.
2, 5, 12, 15, 19, 4, 6, 11, 16, 18, 12, 12, 42
What effect does removing the outlier have on the distribution of the data?

• The mean will decrease

• The median will decrease

• The mean will increase

• The median will increase

A data set is shown below.
56, 64, 73, 59, 98, 65, 59
If the outlier is removed from the data set, which measure of central tendency will be least affected?

• range

• mode

• median

• mean

As x increases, y increases

• correlation coefficient

• causation

• positive correlation

• negative correlation

What is the correlation?

• Negative correlation

• No correlation

• Positive correlation

• All of the above

• ±0.45%

• ±1.72%

• ±5.35%

• ±6.38%

• .05

• .06

• 1414.51

• 7.45

• confidence interval

• margin of error

• population mean

• sample mean

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%

• 95%

• 99.7%

• 50%

Find the Z-score.

Mean = 22

Standard Deviation: 3.1

x = 29

• 2.26

• 16.45

• -2.26

• 1.26

If heights of 3rd graders follow a normal distribution with a mean of 52 inches and a standard deviation of 2.5 inches, what is the z score of a 3rd grader who is 47 inches tall?

• -5

• -2

• 2

• 5