Question

A random sample of =100 observations is selected from a population with μ=31and sigma equals 25σ=25.

Approximate the probabilities shown below.

a. ​ P(x overbarxgreater than or equals≥​28)	b. ​ P(22.1less than or equals≤x overbarxless than or equals≤​26.8)
c. ​ P(x overbarxless than or equals≤​28.2)	d. ​ P(x overbarxgreater than or equals≥​27.0)

a P(x overbarxgreater than or equals≥​28)=________​(Round to three decimal places as​ needed.)

b. ​ P(22.1less than or equals≤x overbarxless than or equals≤​26.8)=__________(Round to three decimal places as​ needed.) c. ​ P(x overbarxless than or equals≤​28.2)=__________(Round to three decimal places as​ needed.) d. ​ P(x overbarxgreater than or equals≥​27.0)=_____(Round to three decimal places as​ needed.)

Answer 1

Answers:

a)0.885

b)0.046

c)0.131

d)0.945

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Explanations

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