The years spent in training of a girl group in Korea is normally distributed with an average of 5 years and a standard deviation of 2.5 years. What is the probability that the average training years of 8 randomly selected girl groups is between 5 to 7 years? A 0.7457 B) 0.4884 0.4571 0.7415

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The years spent in training of a girl group in Korea is normally distributed with an average of 5 years and a
standard deviation of 2.5 years. What is the probability that the average training years of 8 randomly selected
girl groups is between 5 to 7 years?
A 0.7457
B) 0.4884
0.4571
0.7415
Transcribed Image Text:The years spent in training of a girl group in Korea is normally distributed with an average of 5 years and a standard deviation of 2.5 years. What is the probability that the average training years of 8 randomly selected girl groups is between 5 to 7 years? A 0.7457 B) 0.4884 0.4571 0.7415
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