Prices were recorded for all the loaves of bread in a supermarket, the mean price for a loaf of bread was $1.37 with a standard deviation of $0.67, Find the probability that if 13 loaves are selected the mean price is less than $1.00.

A 0.0032

B 0.5643

C 0.9105

D 0.0233

And we want this probability:

And using the normal standard distribution or excel we got:

And the best option would be:

D 0.0233

Step-by-step explanation:

For this case we have the following parameters:

And we select a sample size of n=13. And we want to find this probability:

We can assume that the distribution for this case is normal and then we can use the z score formula given by:

And if we replace the data given we got:

And we want this probability:

And using the normal standard distribution or excel we got:

And the best option would be:

D 0.0233