The population standard deviation for the total snowfalls per year in a city is 13 inches. If we want to be 95% confident that the sample mean is within 3 inches of the true population mean, what is the minimum sample size that should be taken

The minimum sample size that should be taken is 72.

Step-by-step explanation:

We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of .

So it is z with a pvalue of , so

Now, find M as such

In which is the standard deviation of the population and n is the size of the sample.

If we want to be 95% confident that the sample mean is within 3 inches of the true population mean, what is the minimum sample size that should be taken

This is n when M = 3. So

The minimum sample size that should be taken is 72.

10 glasses of juice could be made with 5 carrots, 1,500 orange juice, 2,000 papaya juice.

a

step-by-step explanation: