2.The weights of four randomly and independently selected bagsof potatoes labeled 20 pounds were found to be 21, 22?, ,20.4, and21.2
Assume Normality.
a. Using a? two-sided alternative? hypothesis, should you beable to reject the hypothesis that the population mean is 20
pounds using a significance level of 0.05
Why or why? not? The confidence interval is reported? here: Iam
95?%confident the population mean is between 20.1 and22.2pounds.
b. Test the hypothesis that the population mean is not 20
Use a significance level of 0.05
c. Choose one of the following? conclusions:
i. We cannot reject a population mean of 20 pounds.
ii. We can reject a population mean of 20 pounds.
iii. The population mean is 21.15 pounds.
