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23 September, 21:54

The figure shows a normal distribution curve with a mean of 3.47 and a standard deviation of 0.81. find the value of x, given that 80% of the values are greater than x

a) 2.06

b) 2.79

c) 5.13

d) 1.95

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  1. 23 September, 22:20
    0
    b) 2.79

    Step-by-step explanation:

    Use a calculator or table to find the z-score that corresponds to P (x
    z ≈ - 0.84

    z = (x - μ) / σ

    -0.84 = (x - 3.47) / 0.81

    x = 2.79
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