20. Confidence Intervals: Values of o A random sample of size 36 is drawn from an x distribution. The sample mean is 100. (à) Suppose the x distribution has o = 30. Compute a 90% confidence inter- val for u. What is the value of the margin of error? (b) Suppose the x distribution has o 20. Compute a 90% confidence interval for u. What is the value of the margin of error? (c) Suppose the x distribution has o = 10. Compute a 90% confidence inter- val for u. What is the value of the margin of error? (d) Compre th
20. Confidence Intervals: Values of o A random sample of size 36 is drawn from an x distribution. The sample mean is 100. (à) Suppose the x distribution has o = 30. Compute a 90% confidence inter- val for u. What is the value of the margin of error? (b) Suppose the x distribution has o 20. Compute a 90% confidence interval for u. What is the value of the margin of error? (c) Suppose the x distribution has o = 10. Compute a 90% confidence inter- val for u. What is the value of the margin of error? (d) Compre th
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Problem 1P
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20. Confidence Intervals: Values of o A random sample of size 36 is drawn from
an x distribution. The sample mean is 100.
(à) Suppose the x distribution has o = 30. Compute a 90% confidence inter-
val for u. What is the value of the margin of error?.
(b) Suppose the x distribution has o 20. Compute a 90% confidence
interval for u. What is the value of the margin of error?
(c) Suppose the x distribution has o = 10. Compute a 90% confidence inter-
val for u. What is the value of the margin of eror?
(d) Compare the margins of error for parts (a) through (c). As the standard
deviation decreases, does the margin of error decrease?
(e) Critical Thinking Compare the lengths of the confidence intervals for
parts (a) through (c). As the standard deviation decreases, does the length
of a 90% confidence interval decrease?
a) Interval:
b) Interval:
c) Interval:
d) Yes or No?
e) Yes or No?
Margin of error:
Margin of error:
Margin of error:
to
to
to
Page
2 2
Q +
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