AP Statistics

Reminder:Unit III Individual Assessment on Wednesday 12/16/15

(Chapters 11, 12, & 13)

Please take out your

Unit III Test Review

(1-10) multiple choice

A

A

C

D

B

B

B

A

E

D

AP Statistics

ObjectivePrepare for the Unit III Individual Assessment on

Wednesday

1. Unit III Test Review (11 to 16) open ended

2. Work on Chapter 13 IT (Tennis)

(due Thursday 12/17/15)

AP StatisticsUnit III Test Format

(1 to 10)Multiple Choice

(11 to 13) Open endedo Identify sampling strategies o Random number simulation

o Design and explain an experiment (diagram)

Use the digits 0–3 to represent bags with 6 good sweet potatoes (none bad), digits 4–6 to represent bags with five good sweet potato(one bad), and digits 7–9 to represent bags with four good sweet potatoes(two bad). Look at each single digit of the random number table to determine whether you have 4, 5, or 6 good sweet potatoes in the bag. Continue this until the cumulative count is at least 36 good sweet potatoes.

B

C

E

DA

Experiment – there was an application of a treatment, grape juice, to groups containing randomly assigned subjects with a comparison of the blood pressure across the treatment groups.

There was not a large reduction of blood pressure between the group who drank grape juice and the group who did not drink grape juice; the reduction could be reasonably attributed to random variation (or sampling error).

Randomly assigning subjects to groups allows us to equalize the effects of unknown or uncontrollable sources of variation.

The control group provided a basis for comparison after the sixty days to determine if the group drinking grape juice had lower blood pressure because of the juice. Maybe everyone’s blood pressure naturally drops at a certain time of the year.

By studying only non-smokers the researchers were trying to reduce any impact the smoking might have had on blood pressure. The researchers were trying to remove any confounding the smoking might have made on blood pressure. The new study must be blocked by whether a person smokes or not. Half of each group would then be randomly assigned to the grape juice or no grape juice groups.

Block by smoking status, randomly assigning people in each block to the treatments. Compare blood pressure after 60 days within each block.