Standard Deviation Answers

The monthly mean salaries and standard deviations of four college students are given below.StudentMeanStandard DeviationClarissa$34512.53Abi$5988.99Kaila$81215.29Shenika$2087.67Which statement must be true?

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 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?

The mean ages with standard deviations of four swim teams at a swim club are given below.TeamMeanStandard DeviationStars164.1Dolphins181.5Giants140.3Mackerels152.3Which statement is most likely to be true?

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

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

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

The weekly salaries of a sample of employees at the local bank are given in the table below.EmployeeWeekly SalaryAnja$245Raz$300Natalie$325Mic$465Paul$100What is the variance for the data?Variance:

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

The number of cars sold at a dealership over several weeks is given below.14, 23, 31, 29, 33What is the standard deviation for this set of population data?Standard deviation: