Textile manufacturer, Joywill International, is trying to decide which vendor they should source for a yarn...

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Textile manufacturer, Joywill International, is trying to decidewhich vendor they should source for a yarn needed in one of theirproducts. Vendor A has a lower price than Vendor B but thedetermining factor must be the mean breaking strength of theyarn.
Random samples were drawn from the vendorsâ€™ supply, with resultsshown below:
Vendor A
Vendor B
Sample size
10
12
Sample mean
105
98
Sample variance
8
9
Do these data provide sufficient evidence that the mean yarnstrength for Vendor A is the more than the mean yarn strength forVendor B.
Perform the appropriate hypothesis test using a significancelevel of 0.05.
Do your work in an Excel file. Make Excel do the teststatistic calculation.!!!!!!

Answer & Explanation Solved by verified expert

4.3 Ratings (678 Votes)

using excel we have PooledVariance t Test for the Difference Between Two Means assumes equal population variances Data Hypothesized Difference 0 Level of Significance 005 Vendor A Sample Size See Answer

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	Vendor A	Vendor B
Sample size	10	12
Sample mean	105	98
Sample variance	8	9