Consider the distribution of exam scores (graded from 0 to 100) for 86 students when 38 students got an a, 28 students got a b, and 20 students got a c. complete parts (a) through (d) below.
a. how many peaks would you expect for the distribution?

There is only 1 peak in this distribution.

Step-by-step explanation:

In  the distribution of exam scores (graded from 0 to 100) for 86 students 38 students got an A,  28 students got a B, and 20 students got a C.

Since, 38 > 28 > 20, we can expect only 1 peak in this distribution

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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.