Question

A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 420.0 gram setting. It is believed that the machine is underfilling the bags. A 33 bag sample had a mean of 417.0 grams. A level of significance of 0.01 will be used. Determine the decision rule. Assume the variance is known to be 576.00.

Enter the decision rule.

Answer 1

null hypothesis:Hou Alternate Hypothesis:Hau 420 420 for 0.01 level with left tail test, critical z= -2.326 Decision rule:reject Ho if test statistic z<-2.326 population mean = sample mean 'X= sample size n= std deviation or std errror ='ox=0/Vn= test stat z = '(X-u)*vn/o= p value = 420 417.000 33.00 24.000 4.1779 -0.72 0.2358

from above:

Decision rule:reject Ho if test statistic z< - 2.326

(please try - 2.33 if required with only 2 decimal places

and reply if further help is required on this)