Standard Deviation QUIZ

What is the variance for the data?

D 17,507.5

The teacher wants to find the variance for the class population. What is the value of the numerator of the calculation of the variance?

D 258

Which formula is used to calculate the standard deviation of sample data?

A

A missing data value from a set of data has a z-score of -2.1. Fred already calculated the mean and standard deviation to be mc025-1.jpg and mc025-2.jpg. What was the missing data value? Round the answer to the nearest whole number.

A 39

What is the standard deviation for this set of population data?

A 6.9

Which statement must be true?

A The monthly salary of Shenika is less spread out than the monthly salary of Clarissa.

A set of data has a mean of 12 and a standard deviation of 3. A data point of the set has a z-score of 1.3. What does a z-score of 1.3 mean?

B The data point is 1.3 standard deviations away from 12.

A poll worker analyzing the ages of voters found that mc024-1.jpg and mc024-2.jpg. What is a possible voter age that would give her zx = 1.14? Round your answer to the nearest whole number.

C 71

Which statement is most likely to be true?

NOT D

Abby is collecting rainfall data. She finds that one value of the data set is a high-value outlier. Which statement must be true?

The outlier will increase the standard deviation of the data set. B