Question

a shipment of ball bearings with a mean diameter of 25 mm and a standard deviation of 0.2 mm is normally distributed. by how many standard deviations does a ball bearing with a diameter of 25.6 mm differ from the mean? 0.6 1 2 3

Answer 1

Mean diameter = 25 mm
Standard deviation = 0.2 mm
25.6 mm - 25 mm = 0.6 mm
0.6 mm : 0.2 mm = 3
Answer:
A ball bearing with a diameter 25.6 mm differs from the mean
D ) 3 standard deviations.