Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

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Answer 1

Question

Chapter 12.3, Problem 107E

a.

To determine

Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

b.

To determine

Explain whether the study is a designed experiment or an observational study.

c.

To determine

Explain whether it is reasonableto conclude that taking folic acid causes a reduction in major birth defects from the results of parts (a) and (b).

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You may need to use the appropriate appendix table or technology to answer this question. An agency reports that 11.5% of workers in a particular country belonged to unions. Suppose a sample of 300 workers is collected to determine whether union efforts to organize have increased union membership. (a) Formulate the hypotheses that can be used to determine whether union membership has increased. H0: p = 0.115 Ha: p ≠ 0.115 H0: p > 0.115 Ha: p ≤ 0.115 H0: p ≤ 0.115 Ha: p > 0.115 H0: p ≥ 0.115 Ha: p < 0.115 H0: p < 0.115 Ha: p ≥ 0.115 (b) If the sample results show that 36 of the workers belonged to unions, what is the p-value for your hypothesis test? Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = (c) At ? = 0.05, what is your conclusion? Do not reject H0. There is insufficient evidence to conclude that there has been an increase in union…

Answer 2

Question

Chapter 12.3, Problem 107E

a.

To determine

Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

b.

To determine

Explain whether the study is a designed experiment or an observational study.

c.

To determine

Explain whether it is reasonableto conclude that taking folic acid causes a reduction in major birth defects from the results of parts (a) and (b).

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Answer 3

Question

Chapter 12.3, Problem 107E

a.

To determine

Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

b.

To determine

Explain whether the study is a designed experiment or an observational study.

c.

To determine

Explain whether it is reasonableto conclude that taking folic acid causes a reduction in major birth defects from the results of parts (a) and (b).

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Answer 4

Question

Chapter 12.3, Problem 107E

a.

To determine

Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

b.

To determine

Explain whether the study is a designed experiment or an observational study.

c.

To determine

Explain whether it is reasonableto conclude that taking folic acid causes a reduction in major birth defects from the results of parts (a) and (b).

Expert Solution & Answer

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Answer 5

Chapter 12.3, Problem 107E

a.

To determine

Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

b.

To determine

Explain whether the study is a designed experiment or an observational study.

c.

To determine

Explain whether it is reasonableto conclude that taking folic acid causes a reduction in major birth defects from the results of parts (a) and (b).

Answer 6

Chapter 12.3, Problem 107E

a.

To determine

Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

Answer 7

Chapter 12.3, Problem 107E

a.

To determine

Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

Answer 8

b.

To determine

Explain whether the study is a designed experiment or an observational study.

Answer 9

b.

To determine

Explain whether the study is a designed experiment or an observational study.

Answer 10

c.

To determine

Explain whether it is reasonableto conclude that taking folic acid causes a reduction in major birth defects from the results of parts (a) and (b).

Answer 11

c.

To determine

Explain whether it is reasonableto conclude that taking folic acid causes a reduction in major birth defects from the results of parts (a) and (b).

Answer 12

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Answer 13

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Answer 14

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Answer 15

Ch. 12.1 - Why is statistical inference generally used to...Ch. 12.1 - Prob. 3E Ch. 12.1 - Prob. 4E Ch. 12.1 - Regarding a sample proportion: a. What is it? b....Ch. 12.1 - Regarding the phrase number of successes: a. For...Ch. 12.1 - For what is the phrase number of failures an...Ch. 12.1 - Explain the relationships among the sample...Ch. 12.1 - Prob. 9E Ch. 12.1 - Repeat parts (b)(e) of Exercise 12.9 for samples...Ch. 12.1 - Prob. 11E

Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

Solution Summary: The author concludes that women who take folic acid are at lesser risk of having children with major birth defects or not at 1% level of significance.

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Check whether the data provide sufficient evidence to conclude that women who take folic acid are at lesser risk of having children with major birth defectsor not at 1% level of significance.

Explain whether the study is a designed experiment or an observational study.

Explain whether it is reasonableto conclude that taking folic acid causes a reduction in major birth defects from the results of parts (a) and (b).

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Chapter 12 Solutions