7.c Determine the range of total "talk times" that makes up the middle 90% of the total "talk time" distribution. No answer entered. Click above to enter an answer. 7.d Suppose that an engineer at Motorola obtains a random sample of two Motorola wireless phones fully charged. What is the probability that the "talk time" for both last at least 300 minutes? You may include a hand sketch or the image saved from technology No answer entered. Click above to enter an answer.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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Read the following prompt and complete questions 7.a, 7.b, 7.c, and 7.d

Suppose the total "talk time" for a fully charged Motorola wireless phone is normally distributed with mean 324 minutes and standard deviation 24
minutes.
Question 7 Subquestions
7.a
What proportion of fully charged Motorola wireless phones will have a total "talk time" of less than 280 minutes? You may include a hand sketch or the
image saved from technology
No answer entered. Click above to enter an answer.
7.b
Find the value that completes the following statement:
20% of fully charged Motorola wireless phones will have a total "talk time" longer than
minutes.
Transcribed Image Text:Suppose the total "talk time" for a fully charged Motorola wireless phone is normally distributed with mean 324 minutes and standard deviation 24 minutes. Question 7 Subquestions 7.a What proportion of fully charged Motorola wireless phones will have a total "talk time" of less than 280 minutes? You may include a hand sketch or the image saved from technology No answer entered. Click above to enter an answer. 7.b Find the value that completes the following statement: 20% of fully charged Motorola wireless phones will have a total "talk time" longer than minutes.
7.c
Determine the range of total "talk times" that makes up the middle 90% of the total "talk time" distribution.
No answer entered. Click above to enter an answer.
7.d
Suppose that an engineer at Motorola obtains a random sample of two Motorola wireless phones fully charged. What is the probability that the "talk time"
for both last at least 300 minutes? You may include a hand sketch or the image saved from technology,
No answer entered. Click above to enter an answer.
Transcribed Image Text:7.c Determine the range of total "talk times" that makes up the middle 90% of the total "talk time" distribution. No answer entered. Click above to enter an answer. 7.d Suppose that an engineer at Motorola obtains a random sample of two Motorola wireless phones fully charged. What is the probability that the "talk time" for both last at least 300 minutes? You may include a hand sketch or the image saved from technology, No answer entered. Click above to enter an answer.
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