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According to the testing company, the mean score on a
standardized test is μ = 25 with o = 3. Suppose that a
random sample of n = 81 test scores is taken.
a. Describe the distribution for the sample mean .
Shape: Select an answer
because
Select an answer
Hã
ox
=
b. Calculate the probability that the sample mean is
between 24.9 and 25.6. That is, calculate P(24.9 < x
<25.6). Round your answer to 4 decimal places.
P(24.9 <25.6) =

According To The Testing Company The Mean Score On A Standardized Test Is Μ 25 With O 3 Suppose That A Random Sample Of N 81 Test Scores Is Taken A Describe The class=

Sagot :

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