Answer to Question #319145 in Statistics and Probability for charm

Question #319145

In a science test, the mean score is 42 and the standard deviation is 5. Assuming the scores are normally distributed, what percent of the score is greater than 47


1
Expert's answer
2022-03-28T16:05:40-0400

μ=42,σ=5\mu=42,\sigma=5

P(x>47)=1P(x<47)P(x>47)=1-P(x<47)

=1P(Z<47425)=1-P(Z<\frac{47-42}{5})

=1P(Z<1.0)=1-P(Z<1.0)

=10.8413=1-0.8413

=0.1587=0.1587


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