Question

03. Running times for 400 meters are Normally distributed for young men between 18 and 30 years of age with a mean of 93 man's running time puts him in the upper quartile of running times, that man is: slower than 25% of other men. faster than 25% of other men. faster than 75% of other men. faster than 75% of other men and slower than 25% of other men. nstandard deviation of 15 oz. The proportion of infants with birth weights above 125 or

Answer 1

Solution:-

In a Data Set

Lower Quartile (Q₁)=Median of the Lower half of the Data set,(Means 25% of the data lie below this data point)

Median(Q₂)=Median of the whole data set(Means 50% of the data lie below this data point and 50% of the data lie above this data point so we can say Median is a Midpoint of a data set.)

Upper Quartile(Q₃)=Median of the Upper half of the Data set,(Means 75% of the data lie below this data point)

So, from the above discussion:-  

Correct ans:- faster than 75% of other men and slower than 25% of other men.