1.699

0.56

0.537

19.325

7

72

65

79

Sample mean

t*

Sample standard deviation

Sample size

increasing the confidence level, increasing the sample size

decreasing the confidence level, decreasing the sample size

increasing the confidence level, decreasing the sample size

decreasing the confidence level, increasing the sample size.

12

24

33

None of these.

12

24

33

None of these.

It reflects greater variability present in small samples.

It allows us to decrease the margin of error without increasing our confidence level.

It allows us to use the population standard deviation.

None of these.

We are 95% confident that the true mean calorie content can be found with a sample of 150 to 350 cupcakes.

We are 95% confident that the true mean calorie content in cupcakes is between 150 and 350 calories.

We are 95% confident that a sample of 20 cupcakes will find 250 calories per cupcake.

None of these are correct.

(1070, 2530)

(1273, 2326)

(1799, 1801)

None of these.

1.714

1.711

2.064

None of these.