Standard Deviation – Flashcards

The mean ages with standard deviations of four swim teams at a swim club are given below. Which statement is most likely to be true?

The monthly mean salaries and standard deviations of four college students are given below. Which statement must be true?

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 set of data has a mean of 0.5 and a standard deviation of 0.01. A data point of the set has a z-score of 2.5. What does a z-score of 2.5 mean?

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

A scientist collected two sample sets of snowfall data. Which statistic should he use to compare the spread of the two sets of data?

Fiona recorded the number of miles she biked each day last week as shown below. 4, 7, 4, 10, 5 The mean is given by m = 6. Which equation shows the variance for the number of miles Fiona biked last week?

The test scores of a geometry class are given below. 90, 75, 72, 88, 85 The teacher wants to find the variance for the class population. What is the value of the numerator of the calculation of the variance?

The mean of a set of credit scores is mc021-1.jpg and mc021-2.jpg. Which credit score is within a z-score of 3.3?

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.