A Car manufacturer tests the first 1,000 cars coming off the assembly line to see if their new anti-lock braking system works correctly. Use the typical values for control limits. What % would be an expected outcome in a sample mean that is within +standard deviations of the distribution mean?
I cannot figure this one out. I would appreciate any help|||you have to assume something about the distribution here. I assume that it is assumed normal.
in this case it is a standard calculation, see the link below
look for the value 0.8413 on the tenth line of the table. this corresponds to probability of getting value below 1 std. so you have 1 - 0.8413 = 0.1587
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