State the conclusion based on the results of the test The standard deviation in

Question

State the conclusion based on the results of the test The standard deviation in the pressure required to open a certain valve is known to be a-06 psi Due to changes in the manufacturing process, the quality.control manager feels that the pressure variability has been reduced The null hypothesis was not rejected 0 A. The standard deviation n the pressure has been reduced. O B. There is sufficient evidence that the standard deviation in the pressure required to open a certain valve has been reduced C. There is not sufficient evdence that he standard deviation the pressure requred to open a certain valve has been reduced D There is sufficient evidence that the standard deviation in the pressure required to open a certa n valve has not changed E. The standard deviation n the pressure has not changed F. There is not sufficent evdence that the standard de ation n the pressure required to open a certain valve has not changed Click to select your answer

Explanation / Answer

as null hypothesis has not been rejected. we do not have sufficient evidence that std deviaiton has been reduced

therefore option C is correct

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