Which of the following cannot be a probability?
0, 1, -2, .025, 3/5
-2
100
Is it more likely or unlikely to draw an ace from a deck of cards?
unlikely
100
tylenol placebo
headache 15 65
no headache 17 3
What is the probability of selecting someone with a headache?
.8
100
What is the mode?
2, 3, 7, 4, 8, 7, 3, 9, 7
7
100
A quick quiz consists of a true/false question followed by a multiple choice question with 4 possible answers. What is the probability of randomly guessing 2 correct answers?
1/8
200
What is the probability of an event that is certain to occur?
1
200
Is it unusual to roll an even number when rolling one die?
no
200
tylenol placebo
headache 15 65
no headache 17 3
What is the probability of selecting someone that took Tylenol?
.32
200
What is the median?
7, 12, 13, 6, 9, 2, 4, 3, 9
7
200
In the 108th Congress, the Senate consists of 51 Republicans, 48 Democrats and 1 Independent. What is the probability of selecting 3 Senators and that those 3 Senators are Republican?
17/132
300
What is the probability of an impossible event?
0
300
A basketball player made 5915 free throws in 6676 attempts. On his next trip to the foul line, would it be unusual for him to miss?
yes
300
tylenol placebo
headache 15 65
no headache 17 3
What is the probability of selecting someone who had a headache or was treated with Tylenol?
.97
300
What is the standard deviation of the following sample data?
6, 5, 0, 1, 7, 3, 3, 2, 4, 4, 0, 6, 5, 5, 6
2.24
300
Two 6-sided dice are rolled. What is the probability that the sum of the two numbers on the dice will be 3?
1/18
400
On a multiple choice test with five possible answers for each question, what is the probability of answering the question correctly if you make a random guess?
20%
400
In a recent year, 389 of the 281,421,906 people in the United States were struck by lightening. Would it be unusual for someone to get struck during the next lightening storm?
yes
400
tylenol placebo
headache 15 65
no headache 17 3
What is the probability of selecting someone that who was given a placebo or did not have a headache?
.85
400
What is the mean?
17, 20, 23, 14, 6
16
400
Simplify: (4x^3 + 2x^2 -8x)/2x
2x^2 + x -4
500
In a couple had 3 children, what is the probability that among the three children, there are exactly 2 girls?
3/8
500
What is the probability of having 3 boys out of 3 children?
1/8 or 12.5%
500
I tylenol placebo
headache 15 65
no headache 17 3
If 2 people are randomly selected, find the probability that they both had a headache?
.638
500
Which is a better score: a 72 on a test that has a mean of 80 and a standard deviation of 12 or a score of 19 on a test that has a mean of 20 and a standard deviation of 5?
a score of 19
500
If a person is randomly selected, find the probability that his or her birthday is not in May. Ignore leap years.