Fundamentals
What's the probability that a randomly selected student is in the Prakken advisory?
15/341 = 0.044
When is Pi Day celebrated?
March 14th (3/14)
What is the mode? 2, 3, 5, 4, 8, 5, 3, 5, 7
5
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
What's the probability that a randomly selected student takes Statistics?
39/341 = 0.114
What is the best selling album of all time?
Thriller (by Michael Jackson)
What is the standard deviation? 6, 6, 6, 6, 6, 6, 6
0
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 or 0.129
What's the probability that a randomly selected student takes Stats and is NOT in the Prakken Advisory?
(39+326-31)/341 = 0.979
What number is represented by the letter L in Roman Numerals?
50
What is the median? 7, 12, 13, 6, 9, 2, 4, 3, 9
7
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 or 0.0556
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?
1/5 or 0.2
If 2 students are randomly selected (at the same time), what's the probability that they both take Stats?
(39/341)*(38/340) = 0.013
Name all of Santa's reindeer
Dasher, Dancer, Prancer, Vixen, Comet, Cupid, Donner, Blitzen, and Rudolph
What is the mean? 17, 20, 23, 14, 6
16.0
If a person is randomly selected, find the probability that his or her birthday is not in May. Ignore leap years.
1-(31/365) = 334/365 or 0.915
Are the events taking Stats and being in the Prakken Advisory independent events? Prove using at least one test of independence.
No, they are dependent events. Knowing that a student is in the Prakken Advisory increases the likelihood of them being in Statistics.
P(A) does not equal P(A|B)
P(Stats) = 0.114
P(Stats|Prakken Adv) = 0.533
Who is the only tennis player to have won all four grand slams in the same year (and a singles gold at the Olympics)?
Steffi Graf
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
19 (z = -0.2) v 72 (z = -0.67)
There is 0.2 probability of guessing correctly on any given problem of a multiple choice test. Given a m/c test with 10 questions, what is the probability that a person guesses correctly on AT LEAST one question?
0.893