Question

Amazon would like to compare the shipment of orders with the geographic distribution of the US population. According to the latest statistics by the U.S. Bureau of the Census, 20% of the population lives in the Northeast, 24% in the Midwest, 30% in the South, and 26% in the West. Listed below is a breakdown of a sample of 400 orders randomly selected from those shipped last month. At the .01 significance level, does the distribution of the shipment reflect the population? Region Frequency Northeast 68 Midwest 104 South 155 West 73 Total 400 1. What is the critical Value for the test? 2. What is the computed statistic for the test? 3. If the null hypothesis holds true, what is the expected amount of orders that will come from the West out of the 400 orders? 4. based on your statistical test, which conclusion is correct? use a 0.01 significance level 5. What is the appropriate null hypothesis for carrying out the statistical test?

          Amazon would like to compare the shipment of
orders with the geographic distribution of the US population.
According to the latest statistics by the U.S. Bureau of the
Census, 20% of the population lives in the Northeast, 24% in the
Midwest, 30% in the South, and 26% in the
West.
Listed below is a breakdown of a sample of 400
orders randomly selected from those shipped last month. At the .01
significance level, does the distribution of the shipment reflect
the population? 
Region
Frequency
Northeast
68
Midwest
104
South
155
West
73
Total
400
1. What is the critical Value for the test?
2. What is the computed statistic for the test?
3. If the null hypothesis holds true, what is the expected
amount of orders that will come from the West out of the 400
orders?
4. based on your statistical test, which conclusion is correct?
use a 0.01 significance level 
5. What is the appropriate null hypothesis for carrying out the
statistical test?

Added by Lydia P.

Question

Please give Ace some feedback