Question

Find Shaded Percentile 05 The graph below depicts IQ scores ofâec adults, and those scores are normally distributed with a mean of 1 of 15 Flnd X 0478 Your answer should be a whole number

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Answer 1

Solution:-

05) x = 124.975

Mean = 100, S.D = 15

p-value for the top 0.0478 = 1 - 0.0478 = 0.9522

z-score for the p-value = 1.665

By applying normal distribution:-

$z = \frac{x-\mu }{\sigma }$

x = 124.975

03) z_critical = + 2.054

alpha = 0.02

z_critical = + 2.054