Questions 1-6 represent questionnaire items used in a study of traffic stops.

For each item, identify the most appropriate measure of central tendency (mean, median, or mode) that should be used to describe the data based on its scale of measurement. Please assume that any continuous variables are normally distributed.

Question 1:

Gender (Choose one) 1. Male 2. Female

Mode

Median

Mean

Question 2:

Race/ethnicity (choose one): 1. African American 2. Asian 3. Hispanic 4. White 5. Other (Not Apparent)

Mode

Median

Mean

Question 3:

Approximate age (choose one): 1. Under 15 2. 15-24 3. 25-34 4. 35-44 5. 45-59 6. 60-69 7. 70 and older

Mode

Median

Mean

Question 4:

Speed of vehicle _______ (miles per hour)

Mode

Median

Mean

Question 5:

Result of stop (choose one): 1. Verbal warning 2. Written warning 3. Citation issued 4. Arrest made

Mode

Median

Mean

Question 6:

The following set represents the ages from a sample of 10 individuals that were stopped by police: {19, 30, 31, 35, 36, 42, 45, 50, 52, 60}.

Calculate the standard deviation for the set using the equation discussed in the video lecture. Be sure to **show you work** (i.e., deviations, squared deviations, sums of squares, and the final numbers inputted into the SD formula).

Question 7:

Complete the following sentence:

A standard deviation calculation should only be performed when the data are 1) ___________ and are 2) ___________.

Subject | Mathematics |

Due By (Pacific Time) | 03/01/2015 06:00 pm |

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