Mathematics, 29.11.2019 06:31 aarhakhanna
Aparticular type of 4th grade achievement test provides overall scores that are normally distributed with a mean of 50 and a standard deviation of 10.
what is the probability that a randomly selected student earns a score between 33 and 48?
Answers: 1
. The z-score related to 33 is given by 
and the z-score related to 48 is given by 
. Therefore, the probability that a randomly selected student earns a score between 33 and 48 is given by P(-1.7 < Z < -0.2) = P(Z < -0.2) - P(Z < -1.7) = 0.4207 - 0.0446 = 0.3761.
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