Written Assessment
Statistics Unit Test
Name________________
1. A box contains 4 opals, 5 garnets, and 6 pearls. A jewel is selected at random from the box. Find the probability of the event that the jewel is:
a) an opal
b) either an opal or a pearl
c) a garnet
d) not a garnet
2. A letter is selected randomly from the word PARABOLA. Name the probability of each event.
a) the letter is a vowel
b) the letter is a consonant
c) the letter is an A
d) the letter is a B
3. A cube whose sides are numbered 1,2,3,4,5, and 6 is tossed. Name the odds in favor of each event.
a) the number is odd
b) the number is less than 4
c) the number is 3 or 5
4. Use the counting principle to find the number of possible outcomes of choosing an odd number from 1 through 10 and an even number from 11 through 20.
5. A glass bowl contains 3 red marbles, 2 blue marbles, and 1 green marble. Two marbles are selected at random.
a) Find P(red, then blue)
with replacement:
without replacement:
b) Find P(blue then green)
with replacement:
without replacement:
c) Find P(red then red)
with replacement:
without replacement:
d) Find P(green then red)
with replacement:
without replacement:
6. Find the number of combinations of a committee of 5 chosen from a group of 9 people.
7. Find the number of permutations in the word "Statistics".
8. Find the number of permutations of a quarterback and a kicker from 20 team members.
9. Use a graphing calculator to find the value of each expression.
a) 5P3
b) 5C3
c) 7P4
d) 7C4
10. Bill tossed a thumbtack 60 times. It landed up 27 times and point down 33 times. Find the experimental probability that the thumbtack lands point up.
11. A poll was conducted at the local high school. There are a total of 300 students that attend and 100 were randomly selected. The students were asked what their favorite color was. Here are the results:
Color Number responding
green 25
orange 30
red 15
blue 30
From the results of the poll, about how many people in the whole high school prefer orange?
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This page was originally posted: 1/15/2003; 8:03:27 PM.
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