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QNT 561 Week 4 Weekly Learning Assessments - Assignment

Chapter 10 Exercise 2

[The following information applies to the questions displayed below.]

A sample of 36 observations is selected from a normal population. The sample mean is 12, and the population standard deviation is 3. Conduct the following test of hypothesis using the 0.01 significance level

H0: μ ≤ 10

H1: μ > 10

1. Award: 10 out of 10.00 points

a. Is this a one- or two-tailed test?

b. What is the decision rule?

c. What is the value of the test statistic?

d. What is your decision regarding H0?

e. What is the p-value?

Chapter 10 Exercise 10

Given the following hypotheses:

H0 : μ = 400

H1 : μ ≠ 400

A random sample of 12 observations is selected from a normal population. The sample mean was 407 and the sample standard deviation 6. Using the .01 significance level:

a. State the decision rule. (Negative amount should be indicated by a minus sign. Round your answers to 3 decimal places.)

b. Compute the value of the test statistic. (Round your answer to 3 decimal places.)

c. What is your decision regarding the null hypothesis?

To download QNT 561 Week 2 Complete Answers click here QNT 561 Week 2 Weekly Learning Assessments

Chapter 10 Exercise 12

The management of White Industries is considering a new method of assembling its golf cart. The present method requires 42.3 minutes, on the average, to assemble a cart. The mean assembly time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes. Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?

a. What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)

b. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)

c. What is your decision regarding H0?

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