Bus 220 chapter 1

20 terms by pgc281

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terms

The main purpose of descriptive statistics is to

summarize data in a useful and informativie manner

Ratio

Ordinal

sample

A marketing class of 50 students evaluated the instructor using the following scale: superior, good, average, poor, and inferior. The descriptive summary showed the following survey results: 2 % superior, 8% good, 45% average, 45 % poor, and 0% inferior.

Most students rated the instructor as poor or average

Predicting

The reported unemployment is 5.5% of the population. What type of scale is used to measure unemployment?

Interval or ratio

Continuous

Discrete

ratio

nominal

ratio

ratio

sample

population

population

sample

3

A set of data consists of 45 observations between \$0 and \$29. a. how many classes would you recommend for the frequency distribution? b. What class interval would you recommend? Round your answer to the nearest whole number?

a. 6 (use the 2 to the K rule 2^6)
b. 5 (29-0/6= 4.83 or 5

Example: