Mathematics, 18.03.2021 02:20, lifeisgaming37
A day care program has an average daily expense of $75.00. The standard deviation is $5.00. The owner takes a sample of 64 bills. What is the probability the mean of his sample will be between $70.00 and $80.00?
Step 1: Calculate a z-score for $70.00 -?
Step 2: Give the probability for step 1 ?%
Step 3: Calculate a z-score for $80.00. +?
Step 4: Add the probabilities from. ?%
steps 2 & 4
Answers: 3
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