Test Statistics

What kind of correlation?

• Positive

• Negative

• No

What kind of correlation?

• Positive

• Negative

• No

Identify the outlier for the given data?

23, 34, 27, 7, 30, 26, 28, 31, 34

• 7

• 23

• 31

• 34

Choose the statistical question:

• What time did you wake up this morning?

• What time do 12th graders wake up each morning during the school week?

Calculate the z score for a score of 90 if the mean is 75 and the standard deviation is 4.5.

• -3.33

• 3.33

• 1.77

• 2.1

Jill's Z-score on test with a class average of 82 and a standard deviation of 4 was a +3.0.

What was her actual score?

• 85 %

• 79 %

• 94 %

• 40 %

Women’s heights have a mean of 63.6 in. and a standard deviation of 2.5 inches.  The z score corresponding to a woman with a height is 2.56. How tall is the woman?

• 24.42 in

• 70 in

• 28in

• 68.6in

The mean temperature in Glens Falls for the month of February is 23 degrees with a standard deviation of 4.2 degrees. What is the z-score for a temperature of 17 degrees?

• 1

• 1.43

• -1.43

• 11.5

Scores on a certain standardized test have a mean of 500, and a standard deviation of 100. What score would you need to fall at the 84th percentile?

• 84

• 400

• 500

• 600

Pat and Tom took a test with mean 80 and SD 9. Pat scored a 76; Tom scored a 94. Find the percent of people between their scores.

Hint: Find the z-scores for Pat and Tom. For each z score, use the z-table to find the percent.

Then subtract the percents to find the difference.

• 68.78%

• 63.29%

• 61.06%

• 34.25%