Keystone Data Analysis and Probability

A letter is randomly chosen from the word XYLOPHONE. The probability that it is an O is:

The values of x and y in the two-way table are:

• x = 12, y = 8

• x = 12, y = 11

• x = 16, y = 4

• x = 10, y = 1

• x = 14, y = 6

A bag contains 2 green balls and 1 red ball. Two balls are randomly selected without replacement.

Using a tree diagram, the probability of selecting one of each colour is:

From rolling a biased die, a class finds an experimental probability of 0.3 of rolling a 5.

From 500 rolls of the die, the expected number of 5s would be:

• 300

• 167

• 180

• 150

• 210

The median of the data in this stem-and-leaf plot is:

• 74

• 71

• 86

• 65

• 70

The range of the data in the stem-and-leaf plot is:

• 3

• 8

• 33

• 86

• 14

If Jacob achieved scores of 12, 9, 7 and 12 on his last four language vocabulary tests, what score must he get on the fifth test to have a mean of 11?

• 16

• 14

• 11

• 13

• 15

After flipping a fair coin 200 times, the expected number of heads would be:

• 50

• 100

• 150

• 200

• 175

If a jar contains 5 blue, 3 red, and 2 green marbles, what is the probability of drawing a green marble first then a blue marble without replacement?

What is the sample space of a fair die?

• {1,3,6}

• {1, 2, 3, 4, 5, 6}

• [1, 2, 3, 4, 5]

• {1, 2, 3, 5, 6}