Question 868544
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Hi
a. What are the expected value: 75
the standard deviation: s = {{{15/sqrt(25) = 3}}}
and the shape of the sampling distribution of pr017-1.jpg ? assuming the normal curve
 b. What is the random variable in this problem?  test scores
 c. P( between 70.14 and 82.14) = normalcdf(70.14, 82.14, 75, 3)
 d. P(greater than 82.68) = normalcdf( 82.68, 999, 75, 3)  999 a placeholder
 e. P(less than 78.69)= normalcdf(-999,78.69, 75, 3)