Time spent using e-mail per session is normally distributed with a mean = to 8 minutes and standard deviation = 2minutes. If a random samples of 36 sessions were selected, the computed sample standard deviation would be a. 0.25
b. 0.3333
c. 0.42
d. 0.48

The correct option is (b) 0.3333.

Step-by-step explanation:

The standard deviation of the sampling distribution of sample mean is known as the standard error .

The standard error is given as follows:

The information provided is:

Compute the standard deviation of the sample mean as follows:

Thus, the standard deviation of the sample mean is 0.3333.

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%

7

step-by-step explanation:

the answer would be 7