Pat Valentine's Gifts A survey found that the mean amount customers spend for a Valantine's gift for their pets is 56.20. Assume the distribution of the amount spent is approximately normal and the standard deviation is 50.56. If a random sample of 38 pet owners is selected, find the probability that the mean amount spent of the sample will be less than $6.50. Round intermediate z-value calculations to two decimal places, and the final answer to four decimal places.
P(X < 6.50) =