The average number of years that an employee must
work for a particular data company before earning a
promotion is Normally distributed, with a mean of 4.2
years and a standard deviation of 0.75 years.
Complete the sentence.
The Z-score for Andre's length of employment until
promotion was 0.77, so his length of employment until
promotion was about _____
years.
A. 3.44
B.3.62
C.4.78
D.4.97
