statistic

parameter

standard deviation

margin of error

critical value

confidence level

1.5, 0.6

1.5, 0.3

1.2, 0.3

1.2, 0.6

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.

increases

decreases

does not affect

there is not enough evidence to determine the answer