Determine the percentage of ball bearings with diameters

Reference no: EM13549324

1.If the diameters of ball bearings are normally distributed with mean 0.6140 inches and standard deviation 0.0025 inches, determine the percentage of ball bearings with diameters,

(a) between 0.610 and 0.618 inches inclusive (b) greater than 0.617 inches (c) Less than 0.608 inches (d) equal to 0.615 inches

2.If the height of 300 students are normally distributed with mean 68.0 inches and standard deviation 3.0 inches, how many students have heights,

(a) Greater than 72 inches

(b) Less than or equal to 64 inches

(d) equal to 68 inches

* Assume the measurements to be recorded to the nearest inch

Reference no: EM13549324

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