State Test Practice Data Analysis & Statistics 2

Question 1

If you flip a fair coin, what is the probability of getting heads?

Accepted Answer

1/2

Answer

A fair coin has two equally likely outcomes (heads or tails), so the probability of heads is 1 out of 2, or 1/2.

Question 2

A bag contains 3 red marbles, 4 blue marbles, and 3 green marbles. What is the probability of randomly drawing a blue marble?

Accepted Answer

2/5

Answer

There are 4 blue marbles out of 10 total, giving a probability of 4/10, which simplifies to 2/5.

Question 3

A stem-and-leaf plot shows: Stem 2 | Leaves: 3, 5, 8. What values does this represent?

Accepted Answer

23, 25, 28

Answer

In a stem-and-leaf plot, the stem represents the tens digit and each leaf represents the ones digit, so stem 2 with leaves 3, 5, 8 equals 23, 25, and 28.

Question 4

Which measure of central tendency is most affected by extreme outlier values?

Accepted Answer

Mean

Answer

The mean uses all values in its calculation, so a very high or very low outlier can significantly pull the mean away from the center of the data.

Question 5

A survey of 20 students found that 12 prefer math and 8 prefer reading. What percentage prefer reading?

Accepted Answer

40%

Answer

To find the percentage, divide 8 by 20 and multiply by 100: (8 ÷ 20) × 100 = 40%.

State Test Practice Practice Test

State Test Practice Practice Test

State Test Practice Data Analysis & Statistics 2