To state null and alternative hypotheses

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Answer 1

Question

Chapter 9, Problem 14RE

a)

To determine

To state null and alternative hypotheses

b)

To determine

To check whether z-test or t-test should use

c)

To determine

To find test statistic

d)

To determine

To state decision about null hypothesis at a = 0.05

e)

To determine

To state the conclusion test of hypothesis

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Question 2 A nickel-titanium alloy is used to make components for jet turbine aircraft engines. Cracking is a potentially serious problem in the final part because it can lead to nonrecoverable failure. A test is run at the parts producer to determine the effect of four factors on cracks. The four factors are: pouring temperature (A), titanium content (B), heat treatment method (C), amount of grain refiner used (D). Two replicates of a 24 design are run, and the length of crack (in mm x10-2) induced in a sample coupon subjected to a standard test is measured. The data are shown in Table 2. 1 (a) Estimate the factor effects. Which factor effects appear to be large? (b) Conduct an analysis of variance. Do any of the factors affect cracking? Use a = 0.05. (c) Write down a regression model that can be used to predict crack length as a function of the significant main effects and interactions you have identified in part (b). (d) Analyze the residuals from this experiment. (e) Is there an…

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Stem1: 1,4 Stem 2: 2,4,8 Stem3: 2,4 Stem4: 0,1,6,8 Stem5: 0,1,2,3,9 Stem 6: 2,2 What’s the Min,Q1, Med,Q3,Max?

Answer 2

Question

Chapter 9, Problem 14RE

a)

To determine

To state null and alternative hypotheses

b)

To determine

To check whether z-test or t-test should use

c)

To determine

To find test statistic

d)

To determine

To state decision about null hypothesis at a = 0.05

e)

To determine

To state the conclusion test of hypothesis

Expert Solution & Answer

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Answer 3

Question

Chapter 9, Problem 14RE

a)

To determine

To state null and alternative hypotheses

b)

To determine

To check whether z-test or t-test should use

c)

To determine

To find test statistic

d)

To determine

To state decision about null hypothesis at a = 0.05

e)

To determine

To state the conclusion test of hypothesis

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 9, Problem 14RE

a)

To determine

To state null and alternative hypotheses

b)

To determine

To check whether z-test or t-test should use

c)

To determine

To find test statistic

d)

To determine

To state decision about null hypothesis at a = 0.05

e)

To determine

To state the conclusion test of hypothesis

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 5

Chapter 9, Problem 14RE

a)

To determine

To state null and alternative hypotheses

b)

To determine

To check whether z-test or t-test should use

c)

To determine

To find test statistic

d)

To determine

To state decision about null hypothesis at a = 0.05

e)

To determine

To state the conclusion test of hypothesis

Answer 6

Chapter 9, Problem 14RE

a)

To determine

To state null and alternative hypotheses

Answer 7

Chapter 9, Problem 14RE

a)

To determine

To state null and alternative hypotheses

Answer 8

b)

To determine

To check whether z-test or t-test should use

Answer 9

b)

To determine

To check whether z-test or t-test should use

Answer 10

c)

To determine

To find test statistic

Answer 11

c)

To determine

To find test statistic

Answer 12

d)

To determine

To state decision about null hypothesis at a = 0.05

Answer 13

d)

To determine

To state decision about null hypothesis at a = 0.05

Answer 14

e)

To determine

To state the conclusion test of hypothesis

Answer 15

e)

To determine

To state the conclusion test of hypothesis

Answer 16

Expert Solution & Answer

Answer 17

Expert Solution & Answer

Answer 18

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Answer 19

To state null and alternative hypotheses

Solution Summary: The author states that the null hypothesis is rejected at a significance level of 0.05 and df = 39.

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To state null and alternative hypotheses

To check whether z-test or t-test should use

To find test statistic

To state decision about null hypothesis at a = 0.05

To state the conclusion test of hypothesis

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Chapter 9 Solutions