Originally Posted by

**peanutbutter** Distances between students' homes and school observe normal distribution with mean of 4.76 miles and standard deviation of 1.74 miles. Suppose all examples of size 12 are taken. What percentage of sample means has a value larger than 6.78 miles?

Z=Mean-mean of sample means/ std of sample means, so i have

Z=6.78-4.76/(1.74/sqrt[12])=4.02

I know the next step is to look for a percentage in the table that corresponds to this zscore, but I can't find 4.02 in the table? Can someone talk me through what I *should* be looking for? step by step?