Computer output giving descriptive statistics for the percent of the population that is obese for each of the 50 US states, from the USStates dataset, is given in Figure 2.27. Since all 50 US states are included, this is a population, not a sample.

Figure 2.27

(a) What are the mean and the standard deviation? Include appropriate notation with your answers.
(b) Calculate the z-score for the largest value and interpret it in terms of standard deviations. Do the same for the smallest value.
(c) This distribution is relatively symmetric and bell-shaped. Give an interval that is likely to contain about 95% of the data values.

Transcribed Image Text:

Descriptive Statlstlcs: Obese Variable N N* Obese 50 0 24.552 Mean SE Mean StDev Minimum 0.431 3.044 Q1 Median 17.800 22.175 24.400 26.825 Q3 Maximum 30.900