Significance Tests and Confidence Intervals

Question 1

Based upon the confidence interval, can the sleep scientist reject the null hypothesis?

Revolt · Accepted Answer

She can reject the null hypothesis at = 0.05 because 7.5 is not contained in the 95% confidence interval.

Question 2

one-sided✔ two-sided

Revolt · Accepted Answer

✔ two-sided; When a test is :: two-sided; If the value of interest falls outside a 95% confidence interval, we will reject the null hypothesis at the = significance level.: 0.05; If the value of interest falls outside a 99% confidence interval, we will reject the null hypothesis at the = significance level.: 0.01

Question 3

0.01✔ 0.050.10

Revolt · Accepted Answer

✔ 0.05

Question 4

✔ 0.010.050.10

Revolt · Accepted Answer

✔ 0.01

Question 5

Based on the confidence interval, what conclusion would you make for a test of these hypotheses?

Revolt · Accepted Answer

✔ does not; The 99% confidence interval include as a plausible value, so we would H0. We convincing evidence that the true mean hours of NREM sleep per night for adults who use a weighted blanket 5 hours.: does not; The 99% confidence interval include as a plausible value, so we would H0. We convincing evidence that the true mean hours of NREM sleep per night for adults who use a weighted blanket 5 hours.: 5; The 99% confidence interval include as a plausible value, so we would H0. We convincing evidence that the true mean hours of NREM sleep per night for adults who use a weighted blanket 5 hours.: reject; The 99% confidence interval include as a plausible value, so we would H0. We convincing evidence that the true mean hours of NREM sleep per night for adults who use a weighted blanket 5 hours.: have; The 99% confidence interval include as a plausible value, so we would H0. We convincing evidence that the true mean hours of NREM sleep per night for adults who use a weighted blanket 5 hours.: is different from

Question 6

✔ 55.15.87.5

Revolt · Accepted Answer

✔ 5

Question 7

✔ rejectfail to reject

Revolt · Accepted Answer

✔ reject

Question 8

✔ havedo not have

Revolt · Accepted Answer

✔ have

Question 9

equals✔ is different fromis greater thanis less than

Revolt · Accepted Answer

✔ is different from

Question 10

Based on the confidence interval, what conclusion would you make for a test of these hypotheses?

Revolt · Accepted Answer

✔ does; The 95% confidence interval include as a plausible value, so we H0. We convincing evidence that the true mean amount of REM sleep per night for babies 6 hours.: does; The 95% confidence interval include as a plausible value, so we H0. We convincing evidence that the true mean amount of REM sleep per night for babies 6 hours.: 6; The 95% confidence interval include as a plausible value, so we H0. We convincing evidence that the true mean amount of REM sleep per night for babies 6 hours.: fail to reject; The 95% confidence interval include as a plausible value, so we H0. We convincing evidence that the true mean amount of REM sleep per night for babies 6 hours.: do not have; The 95% confidence interval include as a plausible value, so we H0. We convincing evidence that the true mean amount of REM sleep per night for babies 6 hours.: is different from

Significance Tests and Confidence Intervals Answers

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