Testing a Claim about a Mean Difference

Question 1

Select the correct "state” portion of the hypothesis test.

Revolt · Accepted Answer

H0: μdiff = 0 Ha: μdiff < 0 Where μdiff = the true mean difference (withoutOJ − with OJ) in heart rates for students like these.

Question 2

✔ met-randomized experimentmet-randomly selectednot metnot needed

Revolt · Accepted Answer

✔ met-randomized experiment

Question 3

metnot met✔ not needed

Revolt · Accepted Answer

✔ not needed

Question 4

population is Normaln is at least 30✔ graph: not skewed, no outliers

Revolt · Accepted Answer

✔ graph: not skewed, no outliers

Question 5

a decreasean increase✔ a difference

Revolt · Accepted Answer

✔ a difference

Question 6

Check the 3 conditions for inference:

Revolt · Accepted Answer

✔ One-sample t-test for mean diff; Name:: One-sample t-test for mean diff; Random:: met-randomly selected; 10%: 30 < 10% of .: all sets of twins in the database; Normal/Large Sample: met because .: n is at least 30

Question 7

met-randomized experiment✔ met-randomly selectednot metnot needed

Revolt · Accepted Answer

✔ met-randomly selected

Question 8

Perform the calculations, then complete the conclusion.

Revolt · Accepted Answer

✔ between 0.10 and 0.20; Because the P-value, which is , is = 0.05, we H0. We convincing evidence of , on average, in IQ scores for twins.: between 0.10 and 0.20; Because the P-value, which is , is = 0.05, we H0. We convincing evidence of , on average, in IQ scores for twins.: greater than; Because the P-value, which is , is = 0.05, we H0. We convincing evidence of , on average, in IQ scores for twins.: fail to reject; Because the P-value, which is , is = 0.05, we H0. We convincing evidence of , on average, in IQ scores for twins.: do not have; Because the P-value, which is , is = 0.05, we H0. We convincing evidence of , on average, in IQ scores for twins.: a difference

Question 9

✔ fail to rejectreject

Revolt · Accepted Answer

✔ fail to reject

Question 10

Perform the calculations, then complete the conclusion.

Revolt · Accepted Answer

Because the P-value we calculated is = 0.05, we H0. We convincing evidence to believe that the batteries their ability, on average, to hold a charge during the first year.: is less than; Because the P-value we calculated is = 0.05, we H0. We convincing evidence to believe that the batteries their ability, on average, to hold a charge during the first year.: reject; Because the P-value we calculated is = 0.05, we H0. We convincing evidence to believe that the batteries their ability, on average, to hold a charge during the first year.: have; Because the P-value we calculated is = 0.05, we H0. We convincing evidence to believe that the batteries their ability, on average, to hold a charge during the first year.: do lose

Testing a Claim about a Mean Difference Answers

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