p(1-P) n Formulas: np;√√np(1 − p) ; √√n Here is the quick link to the scientific calculator, and from there, you may navigate to any online statistics calculators using the "Content" tab on the upper-left-hand side. ; The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.3 years and a standard deviation of 0.5 years. He then randomly selects records on 12 laptops sold in the past. Round the answers of following questions to 4 decimal places. a. What is the distribution of X? X - N( 15 b. What is the distribution of ? - N( c. What is the probability that one randomly selected laptop is replaced less than 3.5 years? d. For 12 laptops, find the probability that the average replacement time is less than 3.5 year. e. For part d), is the assumption of normal necessary? Yes No
p(1-P) n Formulas: np;√√np(1 − p) ; √√n Here is the quick link to the scientific calculator, and from there, you may navigate to any online statistics calculators using the "Content" tab on the upper-left-hand side. ; The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 3.3 years and a standard deviation of 0.5 years. He then randomly selects records on 12 laptops sold in the past. Round the answers of following questions to 4 decimal places. a. What is the distribution of X? X - N( 15 b. What is the distribution of ? - N( c. What is the probability that one randomly selected laptop is replaced less than 3.5 years? d. For 12 laptops, find the probability that the average replacement time is less than 3.5 year. e. For part d), is the assumption of normal necessary? Yes No
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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I need help pls with stats
Transcribed Image Text:Formulas: np; √np(1 - p);
Here is the quick link to the scientific calculator, and from there, you may navigate to any online statistics
calculators using the "Content" tab on the upper-left-hand side.
The manager of a computer retails store is concerned that his suppliers have been giving him laptop
computers with lower than average quality. His research shows that replacement times for the model laptop
of concern are normally distributed with a mean of 3.3 years and a standard deviation of 0.5 years. He then
randomly selects records on 12 laptops sold in the past. Round the answers of following questions to 4
decimal places.
Check Answer
a. What is the distribution of X? X - N(
b. What is the distribution of ? - N(
c. What is the probability that one randomly selected laptop is replaced less than 3.5 years?
d. For 12 laptops, find the probability that the average replacement time is less than 3.5 year.
esc.
p(1-p)
n
e. For part d), is the assumption of normal necessary? Yes No
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S4
4
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F4
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5
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F6
Transcribed Image Text:Question 10
Check Answer
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Formulas: np;√√np(1− p);
Here is the quick link to the scientific calculator, and from there, you may navigate to any online statistics
calculators using the "Content" tab on the upper-left-hand side.
esc,
1
>
CNNBC recently reported that the mean annual cost of auto insurance is 1050 dollars. Assume the standard
deviation is 211 dollars, and the cost is normally distributed. You take a simple random sample of 12 auto
insurance policies. Round your answers to 4 decimal places..
30
F1
a. What is the distribution of X? X - N(
b. What is the distribution of ? - N(
c. What is the probability that one randomly selected auto insurance is more than $1072?
d. a simple random sample of 12 auto insurance policies, find the probability that the average cost is more
than $1072.
e. For part d), is the assumption of normal necessary? Yes No
p(1-p)
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σ
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#3
3
80
F3
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4
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