Part 3 of 3 (c) If appropriate, construct a 99.5% confidence interval for the mean price for all phones of this type being sold on the Internet in 2013. Round your intermediate step to three decimal places. Round your answer to one decimal place. A 99.5% confidence interval for the mean price for all phones of this type being sold on the Internet in 2013 is VFW $

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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I just need help with part 3 please

How smart is your phone? A random sample of 9 Samsung Galaxy smartphones being sold over the Internet in 2013 had the following prices, in dollars:
329
149
199
135
Part 1 of 3
Send data to Excel
Assume the population standard deviation is o = 86.
Perform the following.
Part 2 of 3
169
249
100
(a) Explain why it is necessary to check whether the population is approximately normal before constructing a confidence interval.
It is necessary to check whether the population is approximately normal because the sample size is less than or equal to 30
It is
385
349
(b) Following is a dotplot of these data. Is it reasonable to assume that the population is approximately normal?
150
Part 2/3
Skip Part
269
200
Check
250 300 350
▼ reasonable to assume that the population is approximately normal.
BE
400
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C
Transcribed Image Text:How smart is your phone? A random sample of 9 Samsung Galaxy smartphones being sold over the Internet in 2013 had the following prices, in dollars: 329 149 199 135 Part 1 of 3 Send data to Excel Assume the population standard deviation is o = 86. Perform the following. Part 2 of 3 169 249 100 (a) Explain why it is necessary to check whether the population is approximately normal before constructing a confidence interval. It is necessary to check whether the population is approximately normal because the sample size is less than or equal to 30 It is 385 349 (b) Following is a dotplot of these data. Is it reasonable to assume that the population is approximately normal? 150 Part 2/3 Skip Part 269 200 Check 250 300 350 ▼ reasonable to assume that the population is approximately normal. BE 400 C MacBook Air Save For Later C Español 000 llo Submit Assignment © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility C
Part: 2/3
Part 3 of 3
(c) If appropriate, construct a 99.5% confidence interval for the mean price for all phones of this type being sold on the Internet in 2013. Round your
intermediate step to three decimal places. Round your answer to one decimal place.
A 99.5% confidence interval for the mean price for all phones of this type being sold on the Internet in 2013 is
<µ.<
Skip Part
Check
MacBook Air
X
Save For Later
B
000
Submit Assignment
© 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility
Transcribed Image Text:Part: 2/3 Part 3 of 3 (c) If appropriate, construct a 99.5% confidence interval for the mean price for all phones of this type being sold on the Internet in 2013. Round your intermediate step to three decimal places. Round your answer to one decimal place. A 99.5% confidence interval for the mean price for all phones of this type being sold on the Internet in 2013 is <µ.< Skip Part Check MacBook Air X Save For Later B 000 Submit Assignment © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility
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