The process that produces Sonora Bars (a type of candy) is intended to produce bars with a mean weight of 56 gram. The process standard deviation is known to be 0.77 gram. A random sample of 49 candy bars yields a mean weight of 55.82 gram. Find the test statistic to see whether the candy bars are smaller than they are supposed to be.

z= -1.636

Step-by-step explanation:

When population standard deviation is known, then the test statistic is given by :-

, where = sample mean, = population mean, n=sample size , = standard deviation

As per given,

Hence, the e test statistic to see whether the candy bars are smaller than they are supposed to be : z= -1.636

step-by-step explanation:

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