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WorksheetsProbability & Statistics
Total questions: 25
Worksheet time: 37mins
What is the mean of the following list of numbers?
9, 9, 14, 7, 12, 8, 11, 19, 15, 11
9
10
11.5
12.5
What is the median of the following list of numbers?
9, 9, 14, 7, 12, 8, 11, 19, 15, 11
9
11
10
12
The data set: 12, 9, 10, 8, 1, 10, 6
What is the mode?
10
8
7
5
The bakery has three donuts on the shelf:
Glazed -- 75
Chocolate -- 10
Sprinkles -- 15
What is the probability someone randomly selects glazed? Make sure you simplify your fraction.
75/100
3/4
75
4/3
You randomly choose one marble from the bag. What is the theoretical probability of choosing a blue marble?
156 or 52
159 or 53
153 or 51
What is the theoretical probability of spinning a red or a yellow?
52
51
53
50
What is the probability of selecting a "B" on the first spinner and a "Z" on the second spinner?
41
72
121
31
Roberto wants to know the favorite sport of adults in his hometown. He surveys 50 adults at a baseball game. Is this random or biased sampling?
Random
Biased
If you score 76, 85, 97, and 83 on your math tests, what would your median score be?
84
90
85
88
Is the following statement biased or fair: “Would you prefer a vacation in pleasant, sunny Florida, or in the barren wasteland of the Arctic?
Biased
Fair
Neither
Is the following statement biased or fair: “Would you prefer going to the beach or going to the mountains?
Biased
Fair
Neither
If the probability of an event is 1, then it is _________.
likely
unlikely
certain
impossible
Suppose you toss a coin several times and record the results. Out of 20 trials, you got tails 11 times. What is the experimental probability of getting tails?
(a)
This board game spinner is divided into sections of equal size. What is a reasonable estimate of the number of times the spinner will land on a section labeled 5 over the course of 150 spins?
2
20
30
50
A coin is tossed and a fair die is rolled. Find P(heads, greater than 3).
1/6
1/4
5/6
4/5
You roll a fair number cube. What is the probability of getting a 2 or a 5?
1/6
2/6
3/6
4/6
Suppose you have a bag that contains 4 black, 3 green, 1 red, and 2 orange marbles. Find P (not orange). Express your answer as an exact decimal.
(a)
TRUE OR FALSE: A bag of marbles has 1 yellow, 2 blue, 3 red, and 4 green marbles. The probability of picking a yellow marble is 0.
True
False
Mrs. Barraza wants to know how many 7th grade students would like to start a math club. What sample would be the best choice for her survey?
Asking the students in STEM class.
Ask the 30 students with the highest grades.
Ask random students from the whole school.
Ask random students from the whole 7th grade.
At a concert, they are giving away free hats. 9 are pink, 15 are blue, 20 are red. If my favorite color is pink, what is the likelihood I will get a pink one?
Impossible
Unlikely
Equally likely
Likely
A spinner is spun 10 times and here are the results. Which spinner was most likely used?
This shows how many baseball cards a group of friends have in their collections. How many friends have baseball card collections with more than 70 cards?
7
8
9
4
