Statistics and Probability Answers

In a study on survival time for ten patients following a new treatment for AIDS. The time in months were given thus: 24, 12, 8, 20, 3, 18, 24, 25,and 27.Determine the range for the given data.

a. 24
b. 17
c. 8
d. 25

In a study on survival time for ten patients following a new treatment for AIDS. The time in months were given thus: 24, 12, 8, 20, 3, 18, 24, 25,and 27.Determine the median for the given data.

a. 24
b. 6.8
c. 20
d. 17.9

In a study on survival time for ten patients following a new treatment for AIDS. The time in months were given thus: 24, 12, 8, 20, 3, 18, 24, 25,and 27.Determine the mean for the given data.

a. 20
b. 17.9
c. 24
d. 6.8

Three balls are drawn from a box containing 6 red marbles, 4 white marbles and 5 blue marbles. Find the probability that they are drawn in the order: red, white, and blue if each ball is drawn with replacement.

a. 8/225
b. 1/225
c. 4/225
d. 6/225

When a die is thrown, what is the probability that the number is greater than 1, given that it is odd?

a. 1/5
b. 3/5
c. 4/5
d. 2/3

Giving that mean=34, median= 32 and standard deviation as 12. Calculate the Pearson's coefficient of skewness.

a. 0.1
b. 0.4
c. 0.5
d. 1.6

Find the mode of 3,6,10,13, 14,17,19 and 22.

a. 20
b. 17
c. 20
d. 13

Find the median of 3,6,10,13, 14,17,19 and 22.

a. 13
b. 20
c. 17
d. 13.5

Calculate the arithmetic mean of 3,6,10,13,14,17,19 and 22.

a. 20
b. 15
c. 13
d. 17

Seven Matrons assembled for a meeting, shake hands with one another. How many handshakes take place………………?

a. 394
b. 124
c. 5040
d. 490