Which of the following variables is identified as a quantitative discrete variab

Question

Which of the following variables is identified as a quantitative discrete variable? a) Amount of time students study for their math test. b) Social security numbers c) Amount of charge left in the battery of a cell phone d) The number of television sets in each household Which of the following variables is identified as a qualitative ordinal variable? a) The star ratings on an item on Amazon b) Gender of athletes in the Olympics c) The ingredients in a recipe d) Ages of employees at a bakery If a numerical data set has a mean of 7 and a standard deviation of 0, which of the following is true for this data set? a) All the data values are equal to 0. b) Standard deviation can't be 0, so there is an error. c) All the data values are equal to 7. d) The variance of the data set is 49. Which of the following statements is true for measures of spread of a data set? a) If the standard deviation is small, the data values are less spread out. b) The variation is the squareroot of the standard deviation. c) Interquartile range is the difference between the maximum and minimum values. d) Standard deviation is resistant to outliers. Assume that a student is chosen at random from a class. Which of the following pairs of events are independent? a) A: The student is on the basketball team. B: The student is over six feet tall. b) A: The student is born in January. B: The student takes a Math class. c) A. The student has a car. B: The student lives off campus. d) A: The student is a senior. B: The student has a job.

Explanation / Answer

6.

Correct option:

(d) The number of television sets in each household

7.

Correct option:

(a) The star ratings of an item in Amazon

8.

Correct option:

(c) All data values are equal to 7

9.

Correct option:

(a) If the standard deviation is small, the data values are less spread out.

10.

Correct option:

(b)

A. The student is born in January.

B. The student takes a Math class

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