D Scores on a certain intelligence test for children between ages 13 and 15 year

Question

D Scores on a certain intelligence test for children between ages 13 and 15 years are approximately distributed with mu = 111 and sigma = 24 a) Enter the score which marks the lowest 20 % of the distribution = _____ b) Enter the score which marks the highest 15% of the distribution. = _____ Use the value from Table A that comes close to satisfying the condition. Find the number z such that 84.57 % of all observations from a standard Normal distribution are greater than z = _____ Use Table A to find the proportion of the standard Normal distribution that satisfies each of the following statements. -1.84

Explanation / Answer

answer

x = z * + ;
(a) P (x < 93.326) = P (z < -0.8416) = 0.2
(b) P (137.9126 < x) = P (1.2816 < z) = 0.15

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