Introduction to Hypothesis Testing

Question 1

Select the correct population parameter, null hypothesis, and alternative hypothesis. Population Parameter: p = the true proportion of students who are satisfied with the cafeteria food = Null Hypothesis: H0: the true proportion of students who are satisfied with the cafeteria food 0.31 Alternative Hypothesis: Ha: the true proportion of students who are satisfied with the cafeteria food 0.31

Revolt · Accepted Answer

Selection 1: 0.31; Selection 2: equals; Selection 3: is greater than

Question 2

Question 2

Revolt · Accepted Answer

equals

Question 3

Select the correct population parameter, null hypothesis, and alternative hypothesis. Population Parameter: p = the true proportion of students who completed their science homework last night = Null Hypothesis: H0: the true proportion of students who completed their science homework last night 0.50 Alternative Hypothesis: Ha: the true proportion of students who completed their science homework last night is 0.50

Revolt · Accepted Answer

0.50; Selection 1: 0.50; Selection 2: equals; Selection 3: is less than

Question 4

Select the correct population parameter, null hypothesis, and alternative hypothesis. Population Parameter: p = the true proportion of teens who seldom or never argue with their parents = Null Hypothesis: H0: the true proportion of teens who seldom or never argue with their parents is 0.28 Alternative Hypothesis: Ha: the true proportion of teens who seldom or never argue with their parents is 0.28

Revolt · Accepted Answer

0.28; Selection 1: 0.28; Selection 2: equal to; Selection 3: not equal to

Question 5

Assuming that the true proportion of students who are satisfied with the cafeteria food is p = , there is a probability of getting a sample proportion of 0.31 or lower just by chance in a random sample of students.

Revolt · Accepted Answer

0.31; Selection 1: 0.31; Selection 2: 0.00014; Selection 3: 350

Question 6

Assuming that the true proportion of students who complete their science homework is p = , there is a probability of getting a sample proportion of 0.48 or lower just by chance in a random sample of students.

Revolt · Accepted Answer

0.50; Selection 1: 0.50; Selection 2: 0.3886; Selection 3: 50

Question 7

✔ 0.280.490.510.72

Revolt · Accepted Answer

0.28; Selection 1: 0.28; Selection 2: 0.0184; Selection 3: 175

Question 8

What decision should be made at ?

Revolt · Accepted Answer

Reject the null hypothesis.

Question 9

What decision should be made at ?

Revolt · Accepted Answer

Fail to reject the null hypothesis.

Question 10

What decision should be made at ?

Revolt · Accepted Answer

Reject the null hypothesis.

Introduction to Hypothesis Testing Answers

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