For the sample data below, construct four different interval estimates of the population mean, one each for the 90%, 95%, 99%, and 99.9% level. What happens to the interval width as confidence level increases? Why?
X = 100
s = 10
n = 500
For each of the three sample sizes below, construct the 95% confidence interval. Use a sample proportion of 0.40 throughout. What happens to interval width as sample size increases? Why?
Ps=- 0.40
Sample A: n = 100
Sample B: n = 1,000
Sample C: n = 10,000
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