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A Machine Fills 12 -Ounce Bottles with Soda 0.020.02 Ounce a Sample of 8 Bottles Is Selected, and the Machine

Question 115

Multiple Choice

A machine fills 12 -ounce bottles with soda. For the machine to function properly, the standard deviation of the sample must be less than or equal to 0.020.02 ounce. A sample of 8 bottles is selected, and the number of ounces of soda in each bottle is given. At α=0.05\alpha = 0.05 , can you reject the claim that the machine is functioning properly? Justify your answer. (A that the variables are approximately normally distributed.)
12.0411.9111.9111.9111.9111.9712.0112.06\begin{array} { l l l l } 12.04 & 11.91 & 11.91 & 11.91 \\11.91 & 11.97 & 12.01 & 12.06\end{array}


A) χ2=72.000,χcritical 2=14.067\chi ^ { 2 } = 72.000 , \chi _ { \text {critical } } ^ { 2 } = 14.067 ; There is evidence to reject the claim that the machine is working properly.
B) χ2=65.570,χcritical 2=15.507\chi ^ { 2 } = 65.570 , \chi _ { \text {critical } } ^ { 2 } = 15.507 ; There is not enough evidence to reject the claim that the machine is working properly.
C) χ2=72.000,χcritical 2=15.507\chi ^ { 2 } = 72.000 , \chi _ { \text {critical } } ^ { 2 } = 15.507 ; There is evidence to reject the claim that the machine is working properly.

D) χ2=65.570,χcritical 2=14.067\chi ^ { 2 } = 65.570 , \chi _ { \text {critical } } ^ { 2 } = 14.067 ; There is evidence to reject the claim that the machine is working properly.

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