Solutions Practice Test 2B 12.
34.
5. B3 measures effect of an inch on HT (due to the fact one is an inch taller). B1 is this effect plus the effect that because one is taller the probability of being a man
1.
Solutions to Review for Weeks1and 2 What is the difference between descriptive and inferential statistics? Obviously only a crude (but accurate) answer is necessary.
Descriptive merely describes data (mean, std, etc) whereas inferential makes estimate
Practice Test 3C 1. What is meant by the term joint probability? 2. Lets say a household is prosperous if its income exceeds $75,000. Lets say a household is educated if the household completed college. Select an America
NAME: _
I.D.: _ FINAL PROBABILITY AND STATISTICS, ECON 15A DECEMBER 14, 2007
1. In a certain town, 20% of the people belong to Club A. The probability of belonging to Club B given that you dont belong to Club A is 30%. The probability of not belonging to
Stuff I Need to Know for Econ 15A
These questions represent everything you need to know for the upcoming exam (only as
far as we have covered in lecture, of course). The particular numbers in data sets,
parameter values, etc. will be different on the actu
1. In your own words, define and give an example of each of the following statistical terms: a. b. c. d. e. population sample parameter statistic statistical inference
2. Briefly describe the difference between descriptive
12. For the following data, the regression line is Yhat = 0.4 + 0.52X. Please calculate the SEE without calculating the correlation coefficient. (This question is worth 20 points. It counts as two questions. It is worth 20 points not because of its rel
Stuff I Need to Know for Econ 15A
These questions represent everything you need to know for the upcoming exam (only as
far as we have covered in lecture, of course). The particular numbers in data sets,
parameter values, etc. will be different on the actu
Stats 15A Worksheet 2Probability 1. 2. 3. 4. There are three approaches to assigning probabilities. What are they? Define them. Define Event and give an example. Define a sample set and give an example. What does it mean
Stuff I Need to Know for Econ 15A
These questions represent everything you need to know for the upcoming exam (only as
far as we have covered in lecture, of course). The particular numbers in data sets,
parameter values, etc. will be different on the actu
Identify the level of measurement (nominal, ordinal, interval, or ratio) for each of the following variables:
1. Hair color: _ 2. Height:_ 3. Class level as a measure of knowledge (freshman,
sophomore, junior, senior):_ 4. Ice cream flavor:_ 5. Level of i
Solutions Practice Test 2A 1. P(Q1)=1/4N + = 3; P(Q3)= 3/4N + = 9. IQR= 2820=8 2. No, because symmetry means both sides are the same, so cannot have outliers on one side that arent on the other. 3.
4. Mean
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1)
2)
August 2014 Data Set
series x= @recode(hours<40,1,0)
December 2009 Data Set
series y= @recode(hours<40,1,0)
% of persons working less than 40 hours a week in August 2014 = 0.34
% of persons working less than 40 hours a week in December 2009 = 0.36
D
NEED TO KNOWS FINALIZED FOR EXAM 1
Stuff I Need to Know for Econ 15A
These questions represent everything you need to know for the upcoming exam (only as
far as we have covered in lecture, of course). The particular numbers in data sets,
parameter values,
NAME: _
I.D.: _
TEST ONE
PROBABILITY AND STATISTICS, ECON 15A
APRIL 12, 2013
1.
What does each column in a data table represent?
2 4.
(Three questions thirty points) Researchers wanted to examine what affects low birth weight. They were curious about the
NAME: _
I.D.: _
TEST THREE
PROBABILITY AND STATISTICS, ECON 15B
MAY 10, 2013
1. There are 20 marbles in a bag of marbles. Ten are striped, and eight are black. How many need to be both black and striped in order
blackness and stripes to be independent?
2.
NAME: _
I.D.: _
TEST ONE
PROBABILITY AND STATISTICS, ECON 15A
APRIL 13, 2012
1. You want to determine how many loaves of Original Sheepherder Bread are sold per day at Schats Bakery in Bishop, California
[for the year 2011]. You stand outside for ten diff
NAME: _
I.D.: _
TEST FOUR
PROBABILITY AND STATISTICS, ECON 15A
MAY 24, 2013
1 2. (Two questions 20 points) There is a random variable X. It has the probability distribution of f(x) = 0.15 + .025x, for 2 < x < 6.
What is E(X)? Show all work.
3 4. (Two ques
NAME: _
I.D.: _
TEST ONE
PROBABILITY AND STATISTICS, 15A
OCTOBER 7, 2011
1. You want to determine how many loaves of Original Sheepherder Bread are sold per day at Schats Bakery in Bishop, California
[for the year 2010]. You stand outside for ten differen
NAME: _
I.D.: _
TEST ONE
PROBABILITY AND STATISTICS, ECON 15A
OCTOBER 12, 2012
Use the following for questions 16. Subjects were randomly assigned to one of three conditions: (a) playing a highly aggressive video
game; (b) playing a mildly aggressive vid
NAME: _
I.D.: _
TEST ONE
PROBABILITY AND STATISTICS, ECON 15A
APRIL 12, 2013
1.
What does each column in a data table represent?
2 4.
(Three questions thirty points) Researchers wanted to examine what affects low birth weight. They were curious about the
Practice Test 3B Solutions 1. 2. 3. 4. 5. 6. a. Event b. Outcome c. outcome 4/52 x 3/51 x 2/50 x 1/49 13/52 x 12/51 x 11/50 x 10/49 6/6 x 5/6 x 4/6 x 3/6 x 2/6 x 1/6 20.4% x 74.3%= 15.1572% Yes. Because it is saf
Practice Test 3B 1. For the below, identify whether it is an outcome (elementary event) or an event (compound or composite event). a. Picking a Jack from a deck of cards b. Rolling a die and getting a three c. Flippin
Practice Test 3A Solutions 1. 13/52 2. 2/52 3. P(A or B or C)= 1(4/6 x 4/6 x 4/6) 4. 80% 5. 0% 6. .75 7. 4/52 x 3/51 x 2/50 x 1/49 8. Classical AKA Analytical AKA Priori 9. Event. There are 4 different queens (outcom