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In a distribution exactly normal 7% of items are under 35 and 89% of items are under 63. Find the probability that an item selected at random lies between 45 and 56.
written 6.4 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 6.3 years ago

Subject: Applied Mathematics 2

Topic: Probability Distribution

Difficulty: High
engineering mathematics
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written 6.3 years ago by gravatar for teamques10 teamques10 ★ 65k

Since 7% items are below 35 ,i.e. 50 – 7 = 43% items are between 35 & m & since 89% items are below 63 ,89 – 50 =39% items are between m ,and 63.

For area 0.43 , Z =1.48 , since 35 is less than m ,Z= -1.48 …

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