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Use the normal distribution of SAT critical reading scores for which the mean is 507 and the standard deviation is 109. Assume the variable x is normally distributed.

User Yamass
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Answer:

Explanation:

Let X be the variable representing SAT critical reading scores for which the mean is 507 and std dev is 109

X is normal

Critical score for 95% is Z critical = ±1.96

Convert Z to x score as


z=507+1.96(109) and z = 507-1.96(109)

Critical values of X lie in the range

(293.36,720.64)

User Janak Kanani
by
8.8k points
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