The masses of students follow a normal distribution with a mean m and a standard deviation of 1.2 kg. If 90% of the students have a mass of less than A kg, find the mean m.
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Expert's answer
2021-10-03T17:13:57-0400
Standard deviation, = 1.2
Probability = 0.9 for mass of less than A kg
Using inverse normal distribution table, z = 1.282
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