(a) What is the mean service time from the 521 customers? The mean service time from the 521 customers is seconds (Type an integer or a decimal. Do not round.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
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The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. A 99% confidence
interval that results from examining 521 customers in Taco Bell's drive-through has a lower bound of 152.6 seconds and
an upper bound of 158.8 seconds. Complete parts (a) through (c).
....
(a) What is the mean service time from the 521 customers?
The mean service time from the 521 customers is seconds
(Type an integer or a decimal. Do not round.)
Transcribed Image Text:The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. A 99% confidence interval that results from examining 521 customers in Taco Bell's drive-through has a lower bound of 152.6 seconds and an upper bound of 158.8 seconds. Complete parts (a) through (c). .... (a) What is the mean service time from the 521 customers? The mean service time from the 521 customers is seconds (Type an integer or a decimal. Do not round.)
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