At another local coffee shop, wait times for a cup of plain coffee are normally distributed with a mean of 125 seconds and a standard deviation of 22 seconds. a. What percentage of wait times for a cup of plain coffee are less than 90 seconds? Round the percentage to two decimal places. x % 0.0 b. What percentage of wait times for a cup of plain coffee are greater than 125 seconds? 50 c. What percentage of wait times for a cup of plain coffee are between 90 seconds and 125 seconds? Round your answer to two decimal places. 44.41 X%

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 19SGR
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At another local coffee shop, wait times for a cup of plain coffee are normally distributed with a mean of 125 seconds and a standard deviation of 22 seconds.
a. What percentage of wait times for a cup of plain coffee are less than 90 seconds? Round the percentage to two decimal places.
0.0
b. What percentage of wait times for a cup of plain coffee are greater than 125 seconds?
50
X %
44.41
c. What percentage of wait times for a cup of plain coffee are between 90 seconds and 125 seconds? Round your answer to two decimal places.
%
89
X %
d. On a particular day, 200 people waited for a plain cup of coffee. How many of them would we expect to have waited between 90 seconds and 125 seconds to get their coffee? Round to the nearest whole
number.
customers
Transcribed Image Text:At another local coffee shop, wait times for a cup of plain coffee are normally distributed with a mean of 125 seconds and a standard deviation of 22 seconds. a. What percentage of wait times for a cup of plain coffee are less than 90 seconds? Round the percentage to two decimal places. 0.0 b. What percentage of wait times for a cup of plain coffee are greater than 125 seconds? 50 X % 44.41 c. What percentage of wait times for a cup of plain coffee are between 90 seconds and 125 seconds? Round your answer to two decimal places. % 89 X % d. On a particular day, 200 people waited for a plain cup of coffee. How many of them would we expect to have waited between 90 seconds and 125 seconds to get their coffee? Round to the nearest whole number. customers
At the conclusion of training, all factory workers are timed as they complete a task. The completion times for the task are normally distributed.
Suppose a worker's completion time is 0.4 standard deviations above the mean. What is the worker's percentile score? Round your result to one decimal place.
13.6
X %
Transcribed Image Text:At the conclusion of training, all factory workers are timed as they complete a task. The completion times for the task are normally distributed. Suppose a worker's completion time is 0.4 standard deviations above the mean. What is the worker's percentile score? Round your result to one decimal place. 13.6 X %
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