An 80% confidence interval for a proportion is found to be (0.27,0.33). What is the sample proportion?

A. 0.31
B. 0.29
C. 0.33
D. 0.30

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

How can (square root of 25) ^2 be rewritten?

Which expression and diagram represent “renee biked four times as far this month as last month”?