The weights of four randomly and independently selected bags of potatoes labeled 20 pounds were found to
Question:
The weights of four randomly and independently selected bags of potatoes labeled 20 pounds were found to be 215, 221. 203 and 212. Assume Normality
a). Using a two-sided alternative hypothesis, should you be able 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 I am 95% confident the population mean is between 20.1 and 22.5 pounds.
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 H20 H-20 H20 The test statistics (Round to two decimal places as needed)
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 21.275 poundsrnrn
Introductory Statistics Exploring the World Through Data
ISBN: 978-0321978271
2nd edition
Authors: Robert Gould, Colleen Ryan