1

mean 200 minutes, sd $\sqrt{3^2+4^2} = \sqrt{25} = 5$

2a

E

2b

Because the p-value of 0.082 is greater than alpha of 0.05,we will fail to reject the null hypothesis. this means there is not sufficient evidence that there is a significant different between the two ads in terms of whether facebook users click the ad

2c

A

2d

C

3a

the sample is skewed left

3b

the first quartile is 5.5

3c

the range is 1:8

3d

C

4

$X^* < 28, \mu = 20, \sigma = \sqrt{100\times.2\times.8} = 4$