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edwin3448
21.01.2020 •
Mathematics
Select the simplification that accurately explains the following statement
a. = 7
on (1) = 7h 7h = 4 + 1 + 1 = 2 = 72 = 7
b. = 76 77 78 7 11 2 = 72 = 7
c. (2) ² = 72 73 72 = 7.72 = 3.37 = 1.7=7
d. (2)² = 72 72 72 = 7 (2+ + 2) = 72 = 7.1=7
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Ответ:
The probability that the mean receipt for dinner is between $24.50 and $25.50 is
P(24.50≤ x ≤ 25.50)= 0.8324
Step-by-step explanation:
Step(i):-
Given mean of Population(μ) = $25
Given standard deviation of the Population (σ) = 2.30
Sample size 'n' = 40
Let 'X' be the random variable in normal distribution
Given X₁ = 24.50
Given X₂ = 25.50
Step(ii):-
The probability that the mean receipt for dinner is between $24.50 and $25.50
P(x₁≤ x ≤ x₂) = P(Z₁≤ z ≤ Z₂) = A(Z₂) + A(z₁)
P(24.50≤ x ≤ 25.50) = P(-1.375≤ z ≤ 1.375) = A(1.375) + A(1.375)
P(24.50≤ x ≤ 25.50)= 2 A( 1.375)
= 2 × 0.4162 ( from normal table)
= 0.8324
Final answer:-
The probability that the mean receipt for dinner is between $24.50 and $25.50 is 0.8324