Question
A recent study of US children under 11 years old found that they spend on average 142 minutes a day watching tv. Assuming normal distribution with the standard deviation of 44 minutes, answer the following.
A) what percent of children of this age spends over 90 minutes per day watching tv?
B) find and interpret P70, the 70th - percentile.
A) what percent of children of this age spends over 90 minutes per day watching tv?
B) find and interpret P70, the 70th - percentile.