Recall that Table 1.7 presents the satisfaction ratings for the XYZ- Box game system that have been given by 65 randomly selected purchasers. Figures 3.8 and 3.11(a) give the MINITAB and Excel outputs of statistics describing the 65 satisfaction ratings
In fig 3.8

In fig 3.11(a)

a. Find the sample mean on the outputs. Does the sample mean provide some evidence that the mean of the population of all possible customer satisfaction ratings for the XYZ- Box is at least 42? (Recall that a €œvery satisfied€ customer gives a rating that is at least 42.) Explain your answer.
b. Find the sample median on the outputs. How do the mean and median compare? What does the histogram in Figure 2.15 tell you about why they compare this way?

Transcribed Image Text:

FIGURE 3.8 MINITAB Output of Statistics Describing the 65 Satisfaction Ratings (for Exercise 3.5) Variable Count Mean StDe Variance RatingsS 65 42.9542.642 6.982 Variable Minimum Q1 Median 82 Rat ings aw6.000 le41.000 43.000 45.0 48.000 12.000o 3 Maximum Range (a) Satisfaction rating statistics (for Exercise 3.5) Ratings Mean Standard Error Median Mode Standard Deviation Sample Variance Kurtosis Skewness Range Minimum Maximum Sum Count 42.954 0.3277 43 2.6424 6.9822 -0.3922 -0.4466 12 36 48 2792 65