Acompanysellinglicensesofnewe-commercesoftwareadvertisedthatfirmsusingthissoftware
could obtain, on average during the first year, a minimum yield (in
cost savings) of 20...
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Acompanysellinglicensesofnewe-commercesoftwareadvertisedthatfirmsusingthissoftwarecould obtain, on average during the first year, a minimum yield (incost savings) of 20 percent on average on their softwareinvestment. To disprove the claim, we checked with 10 differentfirms which used the software. These firms reported the followingcost-saving yields (in percent) during the first year of theiroperations:
Do we have significant evidence to show that the softwarecompany’s claim of a minimum of 20 percent in cost savings was notvalid? Test using ? = 0.05.
Compute a 95% confidence interval for the average cost-savingyield estimate.
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3.9 Ratings (496 Votes)
Ho 20 Ha Do not reject null hypothesis Conclusion There is not enough evidence to
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