please help asap i will upvote!! Consumer Reports uses a 100-point customer satisfaction score to rate the nation's major chain stores. Assume that from past experience with the satisfaction rating score, apopulation standard deviation of o = 12 is expected. Costco with its 432 warehouses in 40 states was the only chain store to earn an outstanding rating for overall quality. A sample of15 Costco customer satisfaction scores is contained in the Excel Online file below. Construct a spreadsheet to answer the following questions.XOpen spreadsheeta. What is the sample mean customer satisfaction score for Costco (to 2 decimals)?b. What is the sample variance (to 2 decimals)?c. What is the sample standard deviation (to 2 decimals)?d. Construct a hypothesis test to determine whether the population standard deviation of a = 12 should be rejected for Costco.State the null and alternative hypotheses.Ho: 0²H₂ : 0²Calculate the value of the test statistic (to 2 decimals).= 144144p-value isWith a .05 level of significance, what is your conclusion?( D2File12345678910111213141516171819202122232425262728293031วาHomeASatisfactionScore959083769598808080928880976764InsertBArialfxDrawPart aMeanPart bVariancePage Layout✓ 10Part cStandard DeviationPart dDegrees of FreedomсHypothesized Standard DeviationChi Square Test StatisticsLower-Tail p-valueUpper-Tail p-valueTwo-Tail p-valueSignificance Level (alpha)Data +Calculation Mode: Automatic Workbook StatisticsBFormulasCan the hypothesis that the populationstandard deviation is 12 be rejected? (Enter"Can be rejected" or "Cannot be rejected")4.DataDReview120.05ViewEabFormulaHelpNumberF#N/A#N/A#N/A#N/A#N/A#N/A#N/A#N/A#N/A←0.00.00→.0GHEvJEditing27KGive Feedback to MicrosoftLCommentsM100% +

Introduction - mean =sum of observations total number of observations Variance S2=∑xi-x2n-1where ,…

Consumer Reports uses a 100-point customer satisfaction score to rate the nation's major chain stores. Assume that from past experience with the satisfaction rating score, a population standard deviation of a = 12 is expected. Costco with its 432 warehouses in 40 states was the only chain store to earn an outstanding rating for overall quality. A sample of 15 Costco customer satisfaction scores is contained in the Excel Online file below. Construct a spreadsheet to answer the following questions. Open spreadsheet a. What is the sample mean customer satisfaction score for Costco (to 2 decimals)? b. What is the sample variance (to 2 decimals)? c. What is the sample standard deviation (to 2 decimals)? d. Construct a hypothesis test to determine whether the population standard deviation of a = 12 should be rejected for Costco. State the null and alternative hypotheses. Ho: o² = 144 H₂:0² Ⓒ144 Calculate the value of the test statistic (to 2 decimals). p-value is With a .05 level of significance, what is your conclusion?

Consumer Reports uses a 100-point customer satisfaction score to rate the nation's major chain stores. Assume that from past experience with the satisfaction rating score, a population standard deviation of a = 12 is expected. Costco with its 432 warehouses in 40 states was the only chain store to earn an outstanding rating for overall quality. A sample of 15 Costco customer satisfaction scores is contained in the Excel Online file below. Construct a spreadsheet to answer the following questions. Open spreadsheet a. What is the sample mean customer satisfaction score for Costco (to 2 decimals)? b. What is the sample variance (to 2 decimals)? c. What is the sample standard deviation (to 2 decimals)? d. Construct a hypothesis test to determine whether the population standard deviation of a = 12 should be rejected for Costco. State the null and alternative hypotheses. Ho: o² = 144 H₂:0² Ⓒ144 Calculate the value of the test statistic (to 2 decimals). p-value is With a .05 level of significance, what is your conclusion?

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

please help asap i will upvote!!

Consumer Reports uses a 100-point customer satisfaction score to rate the nation's major chain stores. Assume that from past experience with the satisfaction rating score, a
population standard deviation of o = 12 is expected. Costco with its 432 warehouses in 40 states was the only chain store to earn an outstanding rating for overall quality. A sample of
15 Costco customer satisfaction scores is contained in the Excel Online file below. Construct a spreadsheet to answer the following questions.
X
Open spreadsheet
a. What is the sample mean customer satisfaction score for Costco (to 2 decimals)?
b. What is the sample variance (to 2 decimals)?
c. What is the sample standard deviation (to 2 decimals)?
d. Construct a hypothesis test to determine whether the population standard deviation of a = 12 should be rejected for Costco.
State the null and alternative hypotheses.
Ho: 0²
H₂ : 0²
Calculate the value of the test statistic (to 2 decimals).
= 144
144
p-value is
With a .05 level of significance, what is your conclusion?
(

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Part a
Mean
Part b
Variance
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Part c
Standard Deviation
Part d
Degrees of Freedom
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Hypothesized Standard Deviation
Chi Square Test Statistics
Lower-Tail p-value
Upper-Tail p-value
Two-Tail p-value
Significance Level (alpha)
Data +
Calculation Mode: Automatic Workbook Statistics
B
Formulas
Can the hypothesis that the population
standard deviation is 12 be rejected? (Enter
"Can be rejected" or "Cannot be rejected")
4.
Data
D
Review
12
0.05
View
E
ab
Formula
Help
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F
#N/A
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←0
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100% +

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