Answer: 3/4
Step-by-step explanation:
4/4 - 1/4 = 3/4
Given:
μ = 55 in, population mean
σ = 6 in, population standard deviation
Part (a)
x = 48 in, the random variable
Calculate the z-score.
z = (x - μ)/σ
= (48 - 55)/6
= -1.667
From standard table, obtain
P(X < 48) = 0.12167
Answer: 0.1217 (tyo 4 dec.places)
Answer:
x = 15
Step-by-step explanation:
Create the proportion: 5/7 = x/21
Multiply both sides by 21: 15 = x