Smartphones: A poll agency reports that 27% of teenagers aged 12-17 own smartphones. A random sample of 85 teenagers is drawn. Round your answers to at least four decimal places as needed. Part: 0 / 6 Part 1 of 6 (a) Find the mean The mean Part: 1/6 Part 2 of 6 is 0.27 (b) Find the standard deviation The standard deviation GA is 0.0482 Ś X 5
Smartphones: A poll agency reports that 27% of teenagers aged 12-17 own smartphones. A random sample of 85 teenagers is drawn. Round your answers to at least four decimal places as needed. Part: 0 / 6 Part 1 of 6 (a) Find the mean The mean Part: 1/6 Part 2 of 6 is 0.27 (b) Find the standard deviation The standard deviation GA is 0.0482 Ś X 5
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question

Transcribed Image Text:Part 3 of 6
(c) Find the probability that more than 30% of the sampled teenagers own a smartphone.
The probability that more than 30% of the sampled teenagers own a smartphone is 0.2666
Part: 3/6
Part 4 of 6
(d) Find the probability that the proportion of the sampled teenagers who own a smartphone is between 0.25 and 0.30.
The probability that the proportion of the sampled teenagers who own a smartphone is between 0.25 and 0.30 is
Part: 4/6
Part 5 of 6
(e) Find the probability that less than 30% of sampled teenagers own smartphones.
The probability that less than 30% of sampled teenagers own smartphones is
Part: 5/6
Part 6 of 6
(f) Would it be unusual if less than 18% of the sampled teenagers owned smartphones?
It (Choose one)
X
X
5
be unusual if less than 18% of the sampled teenagers owned smartphones, since the probability is
G

Transcribed Image Text:Smartphones: A poll agency reports that 27% of teenagers aged 12-17 own smartphones. A random sample of 85 teenagers is drawn. Round your answers
to at least four decimal places as needed.
Part: 0 / 6
Part 1 of 6
(a) Find the mean
The mean
Part: 1/6
Part 2 of 6
is 0.27
(b) Find the standard deviation
The standard deviation G is 0.0482
Part: 2/6
Ś
X
S
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