The amount of time that a drive-through bank teller spends on a costumer is a random variable with a mean μ = 3.2 minutes and a standard deviation σ = 1.6 minutes. If a random sample of 64 customers is observed, find the probability that their mean time at the teller’s window is: a. At most 2.7 minutes. b. More than 3.5 minutes. c. At least 3.2 minutes but less than 3.4 minutes.
The amount of time that a drive-through bank teller spends on a costumer is a random variable with a mean μ = 3.2 minutes and a standard deviation σ = 1.6 minutes. If a random sample of 64 customers is observed, find the probability that their mean time at the teller’s window is: a. At most 2.7 minutes. b. More than 3.5 minutes. c. At least 3.2 minutes but less than 3.4 minutes.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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The amount of time that a drive-through bank teller spends on a costumer is a random variable
with a mean μ = 3.2 minutes and a standard deviation σ = 1.6 minutes. If a random sample of 64
customers is observed, find the probability that their mean time at the teller’s window is:
a. At most 2.7 minutes.
b. More than 3.5 minutes.
c. At least 3.2 minutes but less than 3.4 minutes.
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