AP Statistics Gathering Data

The officers of a neighborhood association want to know whether residents are interested in beautifying the neighborhood and, if so, how much money they are willing to contribute toward the costs involved. The officers are considering two methods for gathering data: Method A: Call and survey every tenth resident on the association’s roster. Method B: Randomly select and survey 10 residents from among those who come to the neighborhood block party. → Describe another sampling method that is likely to result in a representative sample of the population

• Select residents from odd numbers homes

• Have residents come into the association office to complete the survey

• randomly select names from a roster

Identify the sampling method:

A quality control inspector at a computer assembly plant needs to estimate the number of defective computers in a group of 250 computers. He tests 25 randomly chosen computers

• simple random

• cluster

• stratified

• convenience

Choose the correct sampling method:

A student council wants to know whether students would like the council to sponsor a mid winter dance or mid winter carnival this year

→

Survey a random selection of those who happen to be in the cafeteria at noon

• random sample

• self - selected

• convenience

• stratified

• cluster

What does "mode" mean?

• average

• middle

• repeats the most

• variation

What is a the meaning for "median"?

• fair share

• middle

• repeats the most

• variation

How do you find the mode?

• order least to greatest, then slash from each side until you reach the middle

• add the numbers in your data set, then divide by the amount you added

• look for the number that repeats the most

• highest number minus the lowest number

What is the median?

• 62

• 58

• 66

• 60

What is the range of the set of data?

• 70

• 65

• 80

• 55

What is the mean of test scores?
{70, 70, 80, 85, 85, 90, 95, 95, 100, 100}

• 87

• 85, 95, and 100

• 30

• 85 and 90

A bar graph used to display data grouped into intervals.

• bar graph

• line graph

• stem and leaf plot

• histogram