Question

Sheila's measured glucose level one hour after a sugary drink varies according to the Normal distribution with μμ = 130 mg/dl and σσ = 20 mg/dl. What is the level L such that there is probability only 0.15 that the mean glucose level of 8 test results falls above L?

L=

Answer 1

Given that,

= / n = 20 / 8 = 7.07107

P(Z > 1.04) = 0.15

z = 1.04

= z * + = 1.04 * 7.07107 + 130 = 137.35

L = 137.35