Sample Variance State the null and alternative hypotheses. Ho : oO H : o> Calculate the value of the test statistic (to 2 decimals). The p-value is greater than 0.20 Use Table 4 of Appendix B. What is your conclusion? Do not conclude that the population variances has decreased due to the lean process improvement.

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Author:Amos Gilat
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In an effort to make better use of its resources, the New York City Food Bank engaged in lean process
Improvement. This employee-driven kaizen effort resulted in a new method for packing meals for distribution
to needy families. One goal of the process improvement effort was to reduce the variability in the meal-packing
time. The following table summarizes information from a sample of data using the current method and the new
method. Did the kaizen event successfully reduce the population variation? Use a =
0.10 and formulate the
apprópriate hypothesis test.
Current Method
New Method
Sample Size
n = 41
n = 20
Sample Variance
= 21
= 11
%3D
State the null and alternative hypotheses.
Họ : o
H : o >
Calculate the value of the test statistic (to 2 decimals).
The p-value is greater than 0.20
Use Table 4 of Appendix B.
What is your conclusion?
Do not conclude
that the population variances has decreased due to the lean process
improvement.
Transcribed Image Text:In an effort to make better use of its resources, the New York City Food Bank engaged in lean process Improvement. This employee-driven kaizen effort resulted in a new method for packing meals for distribution to needy families. One goal of the process improvement effort was to reduce the variability in the meal-packing time. The following table summarizes information from a sample of data using the current method and the new method. Did the kaizen event successfully reduce the population variation? Use a = 0.10 and formulate the apprópriate hypothesis test. Current Method New Method Sample Size n = 41 n = 20 Sample Variance = 21 = 11 %3D State the null and alternative hypotheses. Họ : o H : o > Calculate the value of the test statistic (to 2 decimals). The p-value is greater than 0.20 Use Table 4 of Appendix B. What is your conclusion? Do not conclude that the population variances has decreased due to the lean process improvement.
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