1.2 solutions

The standard deviation will always be less than or

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5. The standard deviation will always be less than or equal to the variance. TRUE FALSE If the variance is a number between 0 and 1 then the standard deviation  (square root of the variance) gets larger. 6. The interquartile range is found by taking the difference between the 1st and 3rd quartiles  and dividing that value by 2. TRUE FALSE IQR is found by subtracting: Q3-Q1 7. The standard deviation is expressed in terms of the original units of measurement but the  variance is not. TRUE FALSE

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Variance is measured in units squared. 8. The value of the standard deviation may be either positive or negative, while the value of  the variance will always be positive. TRUE FALSE Standard deviation will always be positive. 9. Which of the following statements is true? (Assume no outliers in the data set.) a. 50% of the values in a data set lie between Q1 and Q3. b. 50% of the values in a data set lie between Q2 and the maximum value. c. 50% of the values in a data set lie between the minimum and the median. d. All of the above are true. 10. The boxplot below shows this data set is close to symmetric. TRUE FALSE Bone Los 50 40 30 20 10 Boxplot of Bone Los 11. The following closely represents the five number summary for the above boxplot: 15, 30, 35, 40, 52. TRUE FALSE Sick Day Problem. A survey of 15 randomly selected employees from Bob’s factory was taken to find out how many sick days they took due to colds and flu last year. A boxplot and some descriptive statistics for the data are shown below.
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