Principles of Statistics ONLINE TEST

p A

a probability of being correct that is equal to the P-value

B

committed a Type II error

C

committed a Type I error

D

a probability of being correct that is equal to 1 - P-value Correct

Points Earned : 1 /1

Your Response : C

10 . A Type II error is

A

incorrectly specifying the null hypothesis

B

accepting the null hypothesis when it is false

C

incorrectly specifying the alternative hypothesis

D

rejecting the null hypothesis when it is true

br Correct

Points Earned : 1 /1

Your Response : B

11 . An SRS of 20 recent birth records at the local hospital were selected . In the sample , the average birth weight was 121 .4 ounces and the standard deviation was 7 .5 ounces . Assume that in the population of all babies born in this hospital , the birth weights follow a Normal distribution , with some mean

Reference : Ref 17-1

The standard error of the mean is

A

1 .7

B

27 .1

C

0 .4

D

6 .1 Correct

follow a Normal distribution , with some mean

Reference : Ref 17-1

We are interested in a 99 confidence interval for the population mean birth weight . The margin of error associated with the confidence interval is

A

1 .07 ounce

B

4 .80 ounces

C

0 .84 ounces

D

21 .46 ounces Correct

low a Normal distribution , with some mean

Reference : Ref 17-1

A 90 confidence interval for the population mean birth weight based on these data is

A

121 .4 - 3 .29 ounces

B

121 .4 - 5 .63 ounces

C

121 .4 - 2 .90 ounces

D

121 .4 - 4 .80 ounces Correct 192 , with standard deviation s 21 . Is this sufficient evidence that the diet is effective in meeting the target ? Assume the distribution of the cholesterol for patients in this group is approximately Normal...