AP Sats test 4

7 Written Questions

1. Sophisticated statistical methods can ALWAYS CORRECT the reulsts if the population you are sampling from is different from the population of interest, for example due to undercoverage
2. LURKING VARIABLES are probably present. Ex: states with larger populations may have both larger numbers of people who don't complete high school and baby deaths
3. all Hemlock trees in the forest from which 200 TREES WERE SELECTED
4. we CAN determine whether the new drug REDUCES symptoms MORE than the old DRUG for THE SUBJECTS of THIS study
5. Let each of the 40 ROADWAYS act as its OWN PAIR, dividing each roadway in HALF...
6. a BLOCK DESIGN
7. Randomization is a good way to create two groups of 20 intersections that are as similar as possible, so that comparisons can be made between the two groups

6 Multiple Choice Questions

1. Cluster Sample
   1. a TEXAS SCHOOL district wants to compare the effectivness of a standard AP Statistics curriculum and a new "hands-on" AP STATS CURRICULUM. 2 teachers, four classes. at the end of the year, all students take the AP exam. the SUBJECTS of the experiment are
   2. an AIRLINE that wants to assess CUSTOMER SATISFACTION chooses a Random Sample of 10 of its FLIGHTS during a SINGLE month and asks them to fill out a survey. This is an example of
   3. According to the 1990 CENSUS, those states with an average number of people X, who fail to complete high school tend to have an above average INFANT DEATHS, Y. the most plausible explanation for the POSITIVE association between DROPOUTS and BABY DEATHS is:
   4. we say that the design of a study is BIASED if hich of the following is true?
2. two factors: the TYPE of AP stats CURRICULUM and the TEACHER
   1. which of the following is a mehod for improving the accuracy of a sample?
   2. we say that the design of a study is BIASED if hich of the following is true?
   3. the TEXAS EXPERIMENT described in the previous questtion has two factors:
   4. which of the following statements is FALSE?
3. Teachers of courese in which the MEAN grade is ABOVE average APPARENTLY tend to have above average teaching evaluations
   1. an article in the STUDENT NEWSPAPER of a large universite headlines A's SWAPPED FOR EVALUATIONS? Results showed that higher grade directly corresponded to a more positive evalutation
   2. an experiment to measure the EFFECT of giving GROWTH HORMONES to Girls affected by TURNER;S SYNDROME was carried out recently. all 34 gils in the study were given and measured A YEAR LATER. which is NOT a problem?
   3. According to the 1990 CENSUS, those states with an average number of people X, who fail to complete high school tend to have an above average INFANT DEATHS, Y. the most plausible explanation for the POSITIVE association between DROPOUTS and BABY DEATHS is:
   4. a sample of STUDENT opinion at a BIG TEN UNIVERSITY selects an SRS of 200 of the 30,000 UNDERGRAD students. this kind of sample is called a:
4. this is an UNCONTROLLED EXPERIMENT
   1. what ELECTRICAL changes occur in MUSCLES as they get tired? students hold their arms above their shoulders as long as they can.
   2. the TEXAS EXPERIMENT described in the previous questtion has two factors:
   3. we say that the design of a study is BIASED if hich of the following is true?
   4. which of the following statements is FALSE?
5. ATWATER, BACON, CHU, JOHNSON
   1. the TEXAS EXPERIMENT described in the previous questtion has two factors:
   2. which of the following is a mehod for improving the accuracy of a sample?
   3. for a certain experiment you have 8 subject. 4 males = ATWAER, BACON, CHU, DIAZ. 4 females = KING LIU,MOORE, JOHNSON
   4. you work for an ADVERTISING AGENCY that is preparing a new television COMMERCIAL to appeal to women....Because of these differences, you should use:
6. A MATCHED PAIRS EXPERIMENT
   1. which of the following statements is FALSE?
   2. the TEXAS EXPERIMENT described in the previous questtion has two factors:
   3. we say that the design of a study is BIASED if hich of the following is true?
   4. to test the effects of a NEW FERTILIZER, 100 plots were divided in Half. FERTILIZER A is randomly applied to one half, and B to the other. that is

6 True/False Questions

1. a sample of STUDENT opinion at a BIG TEN UNIVERSITY selects an SRS of 200 of the 30,000 UNDERGRAD students. this kind of sample is called a: → Teachers of courese in which the MEAN grade is ABOVE average APPARENTLY tend to have above average teaching evaluations

   True        False

2. which of the following is a mehod for improving the accuracy of a sample? → Use a LARGE sample size

   True        False

3. we say that the design of a study is BIASED if hich of the following is true? → Sophisticated statistical methods can ALWAYS CORRECT the reulsts if the population you are sampling from is different from the population of interest, for example due to undercoverage

   True        False

4. a TEXAS SCHOOL district wants to compare the effectivness of a standard AP Statistics curriculum and a new "hands-on" AP STATS CURRICULUM. 2 teachers, four classes. at the end of the year, all students take the AP exam. the SUBJECTS of the experiment are → Let each of the 40 ROADWAYS act as its OWN PAIR, dividing each roadway in HALF...

   True        False

5. an experiment to measure the EFFECT of giving GROWTH HORMONES to Girls affected by TURNER;S SYNDROME was carried out recently. all 34 gils in the study were given and measured A YEAR LATER. which is NOT a problem? → NONRESPONSE BIAS

   True        False

6. a recen survey by a large-circulation CANADIAN MAGAZINE on the contribution of universities to the economy. the main problem with using these results to draw conclusions about the GENERAL PUBLIC'S PERCEPTION is → lack of RANDOM SELECTION

   True        False