Construct a 99% confidence interval for the variance (standard deviation) of all voltages in the house. i. Procedure: Select an answer Select an answer One mean Z procedure One variance x² procedure One proportion Z procedure One mean T procedure ii. Assumptions: (select everything that applies) The number of positive and negative responses are both greater than 10 Population standard deviation is unknown O Normal population Simple random sample Population standard deviation is known Sample size is greater than 30 iii. Unknown parameter: Select an answer Select an answer σ², population variance p, population proportion μ, population mean
Construct a 99% confidence interval for the variance (standard deviation) of all voltages in the house. i. Procedure: Select an answer Select an answer One mean Z procedure One variance x² procedure One proportion Z procedure One mean T procedure ii. Assumptions: (select everything that applies) The number of positive and negative responses are both greater than 10 Population standard deviation is unknown O Normal population Simple random sample Population standard deviation is known Sample size is greater than 30 iii. Unknown parameter: Select an answer Select an answer σ², population variance p, population proportion μ, population mean
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:Question 7
The proper operation of typical home appliances requires voltage levels that do not vary much. Listed
below are 26 voltage levels (in volts) at a random house on 26 different days.
119.8
119.8 120.1 119.7 119.9
120.2 119.8 120.2 119.9 120.1
119.8
120 120 120.4
120
119.9 120.1
120
120 119.9
120.3 119.8 120.3 120.1 119.9
120.2
The mean of the data set is 120.01; the sample standard deviation is 0.183; if the normality plot is not
provided you may assume that the voltages are normally distributed.
Construct a 99% confidence interval for the variance (standard deviation) of all voltages in the house.
i. Procedure: Select an answer
Select an answer
One mean Z procedure
One variance x² procedure
One proportion Z procedure
One mean T procedure
V
ii. Assumptions: (select everything that applies)
The number of positive and negative responses are both greater than 10
Population standard deviation is unknown
O Normal population
Simple random sample
Population standard deviation is known
Sample size is greater than 30
iii. Unknown parameter: Select an answer
Select an answer
o², population variance
p, population proportion
μ, population mean
V
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