A random sample of 169 observations is to be drawn from a population with a mean of 80 and a standard deviation of 39. find the
probability that the mean of the sample will exceed 85.
1 answer:
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Answer:
549
Step-by-step explanation:
A calculator can give you an equivalent expression.
I might work from the middle outward:
= 486 -3 +33×2
= 483 +66
= (480 +60) + (3 +6)
= 540 + 9
= 549
