Mathematics, 04.07.2019 00:00 kristieroth1
The piston diameter of a certain hand pump is 0.5 inch. the manager determines that the diameters are normally​ distributed, with a mean of 0.5 inch and a standard deviation of 0.004 inch. after recalibrating the production​ machine, the manager randomly selects 29 pistons and determines that the standard deviation is 0.0036 inch. is there significant evidence for the manager to conclude that the standard deviation has decreased at the alpha equals 0.01 level of​ significance?
Answers: 1
at 0.01 level of significance for 
is:
is less than the critical value,
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The piston diameter of a certain hand pump is 0.5 inch. the manager determines that the diameters ar...
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