day hw

1. A die is rolled, find the probability that an even number is obtained.

2. Two coins are tossed, find the probability that two heads are obtained. Note: Each coin has two possible outcomes H (heads) and T (Tails).

3. Which of these numbers cannot be a probability? a) -0.00001 b) 0.5 c) 1.001 d) 0 e) 1 f) 20%

4. Two dice are rolled; find the probability that the sum is a) equal to 1 b) equal to 4 c) less than 13

5. A die is rolled and a coin is tossed, find the probability that the die shows an odd number and the coin shows a head.

6. A card is drawn at random from a deck of cards. Find the probability of getting the 3 of diamond.

7. A card is drawn at random from a deck of cards. Find the probability of getting a queen.

8. A jar contains 3 red marbles, 7 green marbles and 10 white marbles. If a marble is drawn from the jar at random, what is the probability that this marble is white?

9. The blood groups of 200 people are distributed as follows: 50 have type A blood, 65 have B blood type, 70 have O blood type and 15 have type AB blood. If a person from this group is selected at random, what is the probability that this person has O blood type?

10 A die is rolled and a coin is tossed, find the probability that the die shows an odd number and the coin shows a head.

Homework 3

Show your work

1. What is the most commonly used measure of central tendency?

a. mean

b. median

c. mode

d. standard deviation

2. It means the sum of all given values or terms in a distribution divided by the number of values or terms summed.

a. Quartile

b. mode

c. standard deviation

d. mean

3. What is the value of the median of the following raw scores? X= 3, 5, 5, 5, 6, 6, 7, 7, 7, 8, 10

a. 6

b. 6.22

c. 6.5

d. 5

4. What is the range of the scores in problem 3?

5. What is the value of the mode of the scores from problem 3?

a. 7

b. 6

c. 5

d. both a and c

6. What is the value of the mean of the scores in problem 3?

a. 6

b. 6.27

c. 6.5

d. 5

7. Which central tendency is most appropriate for the following set of data? (hint: these are scores on a quiz) X: 11, 12, 14, 15, 16, 16, 16, 17, 17, 19

a. Mode

b. You can’t tell due to the skewedness

c. Median

d. Mean

8. Find the 20th percentile for the data in problem 3.

9. Find the 25th percentile for the data in problem 7.

10. What is the value of the standard deviation of the following set of scores? X: 4, 10, 7, 6, 6, 9

a. 4.8

b. 2

c. 4

d. 2.19