Suppose a random sample of 14 people 30-39 years of age produced the household incomes shown here. Use these data to determine a point estimate for the population variance of household incomes for people 30-39 years of age and construct a 95% confidence interval. Assume household income is normally distributed.

$37,600

44,800

33,500

38,500

42,300

32,400

29,100

41,200

46,600

38,500

40,200

30,600

35,500

36,800

Appendix A Statistical Tables

The point estimate is

enter the point estimate

.

enter the lower value of the interval

2

enter the upper value of the interval