Perform a t test to compare population mean repair times

Assignment Help Basic Statistics

Reference no: EM131431936

Comparing repair times in hours. Verizon uses permutation testing for hundreds of comparisons, such as between different time periods, between different locations, and so on. Here is a sample from another Verizon data set, containing repair times in hours for Verizon (ILEC) and CLEC customers.

1528_Table 08.jpg

(a) Choose and make data displays. Describe the shapes of the samples and how they differ.

(b) Perform a t test to compare the population mean repair times. Give hypotheses, the test statistic, and the P-value.

(c) Perform a permutation test for the same hypotheses using the pooled-variance t statistic. Why do the two P-values differ?

(d) What does the permutation test P-value tell you?

Reference no: EM131431936

Questions Cloud

Statistic for the health of the labor market : In his first State of the Union speech, President Trump said: "Tonight, as I outline the next steps we must take as a country, we must honestly acknowledge the circumstances we inherited. Ninety-four million Americans are out of the labor force." ..

O the federal immigration laws preclude arizonas efforts : What happens when the State and Federal government disagree on the creation and enforcement of laws?Do the federal immigration laws preclude Arizona's efforts at cooperative law enforcement and preempt the four provisions of S.B. 1070 on their fac..

Sketch density curves for two populations : When is a permutation test valid? You want to test the equality of the means of two populations. Sketch density curves for two populations for which a permutation test is valid but a t test is not.

Around to catch fish to sell at the fish market : People come from all around to catch fish to sell at the fish market.The total number of fish caught is F = 10x - x2 where x is the number of fishermen. Suppose it costs each person $20 a day to fish and that fish sell for $10 each at the market.

Perform a t test to compare population mean repair times : Choose and make data displays. Describe the shapes of the samples and how they differ.- Perform a t test to compare the population mean repair times. Give hypotheses, the test statistic, and the P-value.

Defining the nature of its separate supply chain functions : Choose an organization that is neither Dell nor Wal-Mart; Do you best to determine how its supply chain operates by defining the nature of its separate supply chain functions

Natural gas-fired commercial boiler : Your company needs to replace its natural gas-fired commercial boiler. The old model (with basic features) has a capacity of 50 MBtu/hr and was purchased in 2007 at the cost of $181,000.

First or third angle projection : You need to model this piece in SolidWorks as shown in attached pic regarding the dimensions - You can model it with approximations and can you please make it easy to adjust for the dimensions.

What is the approximate standard deviation of given value : What is the approximate standard deviation of this value? Would you feel comfortable declaring the results significant at the 5% level? Explain.

User Account

All Pages