In the mid-1980’s, the educational testing service compared the sat scores of college bound seniors with those obtained by a large representative sample of high school juniors. on the verbal sat, the 40th percentile of the scores for the college-bound seniors happened to be equal to the 60th percentile of the scores for the sample of juniors. for both groups, the sd was 100 points. the two histograms followed the normal curve closely. find, approximately, the number of points separating the average of the two groups.

c

step-by-step explanation:

0 and 5 minutes

step-by-step explanation:

given that one morning eight buses arrive late by the number of minutes given below:

0 8 2 6 9 2 0 7 8

write these in ascending order

0   0 2 6 7 8 8 9

in the afternoon two more buses arrive at the bus stop say by x and y minutes late.

total number of buses = 10

median = average of 4th and 5th after arranging in ascending order

since 4th entry is 6, the values of x and y should be below 6

also given 0 is the mode so either x or y or both should be 0 because then only 0 gets the maximum frequency and hence mode

thus we have

0 0 0 2 6 7 8 8 9 and another unknown entry which is below 6.

since median is 3.5, we have the unknown entry to be 5 only because then only median =( 2+5)/2

thus the after noon buses were late by 0 and 5 minutes.