The diameter of small nerf balls manufactured at a factory in china is expected to be approximately normally distributed with a mean of 5.2 inches and a standard deviation of .08 inches. suppose a random sample of 20 balls is selected. calculate the standard deviation of the sampling distribution of the sample mean.

0.018

Step-by-step explanation:

The standard deviation of the sampling distribution of the sample mean is given by :-

Given : and

Then, the standard deviation of the sampling distribution of the sample mean :

Hence, the standard deviation of the sampling distribution of the sample mean = 0.018

the correct answer is b. negative exponential growth.

step-by-step explanation:

you can tell it's an exponential function because it decreases rapidly then levels out and never touches the x-axis.

it is negative because the y-axis decreases as the x-axis increases.

therefore it is a negative exponential growth graph.

hope i !

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation: