2011 Students
Technology
Probability
Bivariate Data
Miscellaneous
100
This student asks the most questions during an exam.
Who is a Jo
100
The brand of calculator that most students at RIS use.
What is Casio ?
100
P(A) + P(B) - P(A and B)
What is P(A or B) ?
100
The graph that we get when we plot all the bivariate points.
What is a scatterplot ?
100
How many rolls of one die does one expect to make before getting the first roll of ONE ?
What is SIX ?
200
This student is always in the 90 percentile on each test.
Who is Tor ?
200
The device that puts the computer screen image on the big screen.
What is a projector ?
200
0.6 if P(A) = 0.4
What is the probability of "not" A ?
200
The three ways that we describe a bivariate association.
What is direction, strength, and shape ?
200
There are 50 poker chips in a container, 25 of which are red, 15 white, and 10 blue. You draw a chip without looking 25 times, each time returning the chip to the container. What is the expected number of white chips you will draw in 25 draws?
P(draw a white chip) = 15/50 =.3 E(X) = 25(.3) =7.5
300
These students are not seniors nor ROTCers.
Who are Ice and Man ?
300
The legally free program that does great statistics on a Windows based computer platform.
What is WinStats
300
The probability of flipping two coins and both land "heads".
What is 1/4 ?
300
The graph that we use to determine if there is a linear relationship or not.
What is residual plot ?
300
A basketball player makes 80% of her free throws. We put her on the free throw line and ask her to shoot free throws until she misses one. What is the probability that the player will make 5 shots before she misses?
P(success = miss) P(X =6) = (1-.2)^5 (.2) = .0655
400
The President of the the Pencil Sharpening Club.
Who is Net ?
400
Usually near Ice, but sometimes in the teacher's front drawer unless it is underneath something.
Where is the remote for the projector ?
400
The condition that causes P(A|B) = P(A)
What is A and B are INDEPENDENT ?
400
The difference between an observed value of the response variable and the value predicted by the regression line.
What is residuals?
400
10% of adults belong to health clubs. and 40% of these helath club members go to the club at least twice a week. What percent of all adults go to a health club at least twice a week?
let H = adult belongs to health club and G = adult goes to club at least twice a week. P(G and H) = P(H) X P(G|H) = 0.1 x 0.4 = .04
500
All Normal distributions are the same when measurements are standardized. If x has the N(mu, sigma) distribution, then this variable has the standard Normal distribution N(0,1)
What is a z score.
500
A group of experimental units or subjects that are known before the experiment to be similar in some way that is expected to systematically affect the response to the treatments.
What is a block?
500
mu(x) = the sum of ((xi)(pi))
What is mean of a discrete random variable?
500
An association or comparison that holds for all of several groups can reverse direction when the data are combined to form a single group.
What is Simpson's Paradox?
500
A rapid test for the presence in the blood of antibodies to HIV, the virus that causes AIDS, gives a positive result with probability about .004 when a person who is free of HIV antibodies is tested. A clinic tests 1000 people who are all free of HIV antibodies. You cannot use the Normal approximation for this distribution. Explain why.
We need n(p) and n(1-p) both to be at least 10, and we have n(p) =4 so the condition is not met.
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