A survey information given below, Sample mean = 5.5, s=2.517, df=8 and confidence level 95% (coresponding test statistic value is 2.303). Based on this information answer the following: Which test is appropriate, z-test or t-test? Type either "z-test" or "t-test" What was the sample size? A Calculate the margin of error. (Report two decimal point, #.##) A Calculate the confidence interval-write lower and uppler value using comma ",". (Report two decimal point: #.##, #.##) A If the df increases to 30 then what will impact on the margin of error? Write either "increase" or "decrease" or "no change" AA If the df increases to 30 then what will impact on the confidence interval? Write either "wide" or "narrow" or "no change"
A survey information given below, Sample mean = 5.5, s=2.517, df=8 and confidence level 95% (coresponding test statistic value is 2.303). Based on this information answer the following: Which test is appropriate, z-test or t-test? Type either "z-test" or "t-test" What was the sample size? A Calculate the margin of error. (Report two decimal point, #.##) A Calculate the confidence interval-write lower and uppler value using comma ",". (Report two decimal point: #.##, #.##) A If the df increases to 30 then what will impact on the margin of error? Write either "increase" or "decrease" or "no change" AA If the df increases to 30 then what will impact on the confidence interval? Write either "wide" or "narrow" or "no change"
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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Transcribed Image Text:A survey information given below,
Sample mean = 5.5, s=2.517, df=8 and confidence level 95%
(corresponding test statistic value is 2.303).
Based on this information answer the following:
Which test is appropriate, z-test or t-test? Type either "z-test" or "t-test"
What was the sample size?
Calculate the margin of error. (Report
two decimal point, #.##)
Calculate the
confidence interval-write lower and uppler value using comma ",". (Report two
decimal point: #.##, #.##)
If the df
increases to 30 then what will impact on the margin of error? Write either "increase"
or "decrease" or "no change"
If the df
increases to 30 then what will impact on the confidence interval? Write either "wide"
or "narrow" or "no change"
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