A manufacturer the formula of cake mix. Past records indicate that the average shelf life of the current formula is 216

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A manufacturer the formula of cake mix. Past records indicate that the average shelf life of the current formula is 216

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A Manufacturer The Formula Of Cake Mix Past Records Indicate That The Average Shelf Life Of The Current Formula Is 216 1
A Manufacturer The Formula Of Cake Mix Past Records Indicate That The Average Shelf Life Of The Current Formula Is 216 1 (42.35 KiB) Viewed 17 times
A manufacturer the formula of cake mix. Past records indicate that the average shelf life of the current formula is 216 days. Assume that cake mix is distributed normally with a population standard deviation of 4.00 .A revised mix has been developed and the sample mean of 25 boxes of cake mix using the new formula is 218. Using a = 0.10, has the shelf life of the cake mix changed? 1) No, because computed z lies in the region of acceptance. 2) No, because 218 is quite close to 216. 3) Yes, because computed z is greater than the critical value. 4) Yes, because computed z is less than the critical value.
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