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Answered: - To decide whether or not to purchase a new hand-held laser
To decide whether or not to purchase a new hand-held laser scanner for use in inventorying stock, tests are conducted on the scanner currently in use and on the new scanner. These data are obtained on the number of 7-inch bar codes that can be scanned per second:
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new ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? old
n1 = 61 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?n2 = 61
x1(bar) = 40 ? ? ? ? ? ? ? ? ? ? ? ? ? ? x2(bar) = 29
? ?2 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?2
s ? ? ?= 24.9 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? s ? ? ? = 22.7
? 1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 2
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? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?2 ? ? ? ? ? ? ? ? ?2
#1. Test H0: sigma ? ? ?= ?sigma ? ? ? at the alpha = 0.2 level to be sure that pooling is appropriate.
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1 ? ? ? ? ? ? ? ? ? 2
#2. Does the new laser appear to read more bar codes per second on the average ? Explain.
#3. Since the number of bar codes that can be scanned per second is discrete, we have not satisfied the normality requirement. What theorem justifies the use of the pooled T procedure in this case ?
To decide whether or not to purchase a new hand-held laser scanner for use in inventorying
stock, tests are conducted on the scanner currently in use and on the new scanner. These data are
obtained...
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DATE ANSWEREDOct 07, 2020
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