Cake manufacturer Little Diva’s wants...... - 11451

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mareya

mareya

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  • Posted on: Fri 22 Jun, 2012
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Request Description

Cake manufacturer Little Diva’s wants to increase the shelf life of its easy-to-fix cupcake mixes. Company’s records indicate that the average shelf life of the mix is 230 days. A new, improved cupcake mix was developed and a sample of 10 boxes of the cupcake mix had these shelf lives (in days): 231, 233, 232, 233, 228, 231, 234, 229, 235, and 232. If the standard deviation was .67 and at the 0.025 significant level, has the shelf life of the cupcake mix increased? 

A.   No, because 231.8 is quite close to 230. 

B.   No, because computed t lies in the region of acceptance. 

C.   Yes, because computed t is greater than the critical value.

D.   Yes, because computed t is less than the critical value. 

 
Solution Description

Cake manufacturer Little Diva’s wants to increase the shelf life of its easy-to-fix cupcake mixes. Company’s records indicate that the average shelf li