We have given population data for a variable. For each exercise, do the following tasks.

a. Find the mean, μ, of the variable.

b. For each of the possible sample sizes, construct a table similar to Table 7.2 and draw a dotdot plotr the sampling distribution of the sample mean similar to Fig. 7.1.

c. Construct a graph similar to Fig. 7.3 and interpret your results.

d. For each of the possible sample sizes, find the probability that the sample mean will equal the population mean.

e. For each of the possible sample sizes, find the probability that the sampling error made in estimating the population mean by the sample mean will be 0.5 or less (in magnitude), that is, the absolute value of the difference between the sample mean and the population mean is at most 0.5.

Fig. 7.3

Fig 7.1

Population data: 3, 4, 7, 8.

Transcribed Image Text:

FIGURE 7.1 Dotplot for the sampling distribution of the sample mean for samples of size 2 (n=2) J 76 L I 77 78 1 79 L L 80 81 H I 82 83 LX 84