A day care program has an average daily expense of $75.00. The standard deviation is $15.00. 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 the z-score for $80.00:
Step 4. Give the probability for step 3:
Step 5. Add the probabilities from steps 1&3:

i just took the test, the correct answer is .. 31.5 in.

describing distributions is one of the key skills you’ll need to earn a high score on the ap statistics exam. if you need proof of this, just flip through some past exam questions, which can be found at the collegeboard website. you’ll notice that the first free response question is almost always a question requiring you to look at a graph and describe it.

step-by-step explanation: just trying to get points sorry : (