A girl wants to count the steps of a moving escalator which is going up. If she is going up on it, she counts 60 steps. If she i
1 answer:
You might be interested in
Answer:
And replacing we got:
Step-by-step explanation:
For this case we have the following info given:
represent the mean
represent the deviation
We select a sample size of n=100. This sample is >30 so then we can use the central limit theorem. And we want to find the distribution for the sample mean and we know that the distribution is given by:
And replacing we got: