a. For a true-false test with 25 questions, how many would you have to get right to do significantly better than chance? That is, what X value is needed to produce a z -score greater than 1.96? b. How many would you need to get right on a 40-question true-false test? c. How many would you need to get right on a 100-question true-false test? Remember that each X value corresponds to an interval with real limits. Be sure that the entire interval is in the critical region.

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Answer 1

Question

Chapter 18, Problem 10P

To determine

a. For a true-false test with 25 questions, how many would you have to get right to do significantly better than chance? That is, what X value is needed to produce a z-score greater than 1.96?

b. How many would you need to get right on a 40-question true-false test?

c. How many would you need to get right on a 100-question true-false test?

Remember that each X value corresponds to an interval with real limits. Be sure that the entire interval is in the critical region.

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Answer 2

Question

Chapter 18, Problem 10P

To determine

a. For a true-false test with 25 questions, how many would you have to get right to do significantly better than chance? That is, what X value is needed to produce a z-score greater than 1.96?

b. How many would you need to get right on a 40-question true-false test?

c. How many would you need to get right on a 100-question true-false test?

Remember that each X value corresponds to an interval with real limits. Be sure that the entire interval is in the critical region.

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Answer 3

Question

Chapter 18, Problem 10P

To determine

a. For a true-false test with 25 questions, how many would you have to get right to do significantly better than chance? That is, what X value is needed to produce a z-score greater than 1.96?

b. How many would you need to get right on a 40-question true-false test?

c. How many would you need to get right on a 100-question true-false test?

Remember that each X value corresponds to an interval with real limits. Be sure that the entire interval is in the critical region.

Expert Solution & Answer

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Answer 4

Question

Chapter 18, Problem 10P

To determine

a. For a true-false test with 25 questions, how many would you have to get right to do significantly better than chance? That is, what X value is needed to produce a z-score greater than 1.96?

b. How many would you need to get right on a 40-question true-false test?

c. How many would you need to get right on a 100-question true-false test?

Remember that each X value corresponds to an interval with real limits. Be sure that the entire interval is in the critical region.

Expert Solution & Answer

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Answer 5

Chapter 18, Problem 10P

To determine

a. For a true-false test with 25 questions, how many would you have to get right to do significantly better than chance? That is, what X value is needed to produce a z-score greater than 1.96?

b. How many would you need to get right on a 40-question true-false test?

c. How many would you need to get right on a 100-question true-false test?

Remember that each X value corresponds to an interval with real limits. Be sure that the entire interval is in the critical region.

Answer 6

Chapter 18, Problem 10P

To determine

a. For a true-false test with 25 questions, how many would you have to get right to do significantly better than chance? That is, what X value is needed to produce a z-score greater than 1.96?

b. How many would you need to get right on a 40-question true-false test?

c. How many would you need to get right on a 100-question true-false test?

Remember that each X value corresponds to an interval with real limits. Be sure that the entire interval is in the critical region.

Answer 7

Chapter 18, Problem 10P

To determine

a. For a true-false test with 25 questions, how many would you have to get right to do significantly better than chance? That is, what X value is needed to produce a z-score greater than 1.96?

b. How many would you need to get right on a 40-question true-false test?

c. How many would you need to get right on a 100-question true-false test?

Remember that each X value corresponds to an interval with real limits. Be sure that the entire interval is in the critical region.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 18 - 1. Insurance companies charge young drivers more...Ch. 18 - 2. Güven, Elaimis, Binokay, and Tan (2003) studied...Ch. 18 - In problem 9 in Chapter 17, we described a study...Ch. 18 - 4. Problems 5 and 6 in Chapter 17 cited a study...Ch. 18 - 5. A researcher would like to determine whether...Ch. 18 - 6. A recent survey of practicing psychotherapists...Ch. 18 - 7. In 2005, Fung et al. published a study...Ch. 18 - 8. In problem 13 in Chapter 9, wepresented a study...Ch. 18 - Prob. 9P Ch. 18 - Prob. 10P

Solution Summary: The author explains that a two-tailed test using the normal approximation to the binomial distribution is being used to evaluate the significance of the result.

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