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A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 27.3 minutes and a sample standard deviation of 6 minutes. Complete parts (a) through (d) below. a. Using the critical value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes? State the null and alternative hypotheses for this test. ΟΑ. Ηρ: με 27.3 H1: µ<27.3 ΟΒ. Η : μs 30 OC. Ho: H> 30 H: us 30 H7: µ> 30 ΟD. Ho: μ< 30 H,: µ2 30 E. Ho: H230 ΟΕ H : μs27.3 H,: µ<30 H,: µ> 27.3 What is the test statistic for this test? tSTAT =O (Type an integer or a decimal. Round to two decimal places as needed.)

A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 27.3 minutes and a sample standard deviation of 6 minutes. Complete parts (a) through (d) below. a. Using the critical value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes? State the null and alternative hypotheses for this test. ΟΑ. Ηρ: με 27.3 H1: µ<27.3 ΟΒ. Η : μs 30 OC. Ho: H> 30 H: us 30 H7: µ> 30 ΟD. Ho: μ< 30 H,: µ2 30 E. Ho: H230 ΟΕ H : μs27.3 H,: µ<30 H,: µ> 27.3 What is the test statistic for this test? tSTAT =O (Type an integer or a decimal. Round to two decimal places as needed.)

MATLAB: An Introduction with Applications
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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What is the test statistic for this​ test?
 
tSTAT=
 
​(Type an integer or a decimal. Round to two decimal places as​ needed.)
A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 27.3 minutes and a sample standard deviation of 6 minutes. Complete parts (a) through (d) below. a. Using the critical value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes? State the null and alternative hypotheses for this test. Ο Α. Η μ= 27.3 H1: µ< 27.3 Ο Β. Η με 30 H: µ> 30 Ос. Но: и» 30 H1: µs 30 O D. Ho: µ< 30 ΟΕ H : μ< 27.3 E. Ho: µ2 30 H4: µ<30 H1: µ2 30 H,: µ> 27.3 What is the test statistic for this test? ISTAT = (Type an integer or a decimal. Round to two decimal places as needed.)
Transcribed Image Text:A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to reduce the mean time between the order and completion of delivery from the current 30 minutes. A sample of 36 orders using the new delivery process yields a sample mean of 27.3 minutes and a sample standard deviation of 6 minutes. Complete parts (a) through (d) below. a. Using the critical value approach, at the 0.01 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 30 minutes? State the null and alternative hypotheses for this test. Ο Α. Η μ= 27.3 H1: µ< 27.3 Ο Β. Η με 30 H: µ> 30 Ос. Но: и» 30 H1: µs 30 O D. Ho: µ< 30 ΟΕ H : μ< 27.3 E. Ho: µ2 30 H4: µ<30 H1: µ2 30 H,: µ> 27.3 What is the test statistic for this test? ISTAT = (Type an integer or a decimal. Round to two decimal places as needed.)
Expert Solution
Step 1

From the provided information,

Sample size (n) = 36

Sample average score (x̄) = 27.3

Sample standard deviation (s) = 6

Level of significance (α) = 0.01

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