AP Stats Collecting Data

Eugene wants to find out how many people like seafood, so Eugene divides the group of people by their taste in music, and then randomly choose people from each music group to make the whole sample. Which type of sampling is this?

• stratified sampling

• volunteer sampling

• simple random sampling

• convenience sampling

Harold has decided to conduct a survey to find out how many students like seafood. Using stratified random sampling; tell Harold how to pick out 30 subjects for the survey.

• First, make a list of students in the school, and number each possible subject. Next, using a random number table, pick out in order any number between 1 and the number of students in the school. Continue picking out numbers until you have 30 subjects. Ignore any numbers that are out of range in the table.

• First, divide students in the school into groups of what they eat for lunch. Then we use a random number table to take a relative amount of people (relative to the size of each group), making sure that we will end up with 30 subjects in the end.

• First, make a list of students in the school. Next, we'll divide the number of students in the school by 30 to figure out how far to space out our choices. Next, use a random number table to pick our first subject. From that subject, count out the same amount each time (the number of students in the school divided by 30) until we have 30 subjects.

• First, divide students in the school into groups based upon Lunchtime. Then we randomly pick a few groups of Lunchtime to choose our sample from. Randomly (using a random number table), we pick out the same amount from each Lunchtime so that we end up with a sample of 30 subjects.

Adam is planning a survey on how much money

students spend at a mall. Adam lists out all the

possible people who they need to ask, and by

using a random number generator picks where

to start choosing people. Then, by working

backwards through the list, picks every 14th

person for the sample. Which sampling type

was used?

• simple random sample

• cluster random sample

• stratified random sample

• systematic random sample

Erin has decided to conduct a survey to find out the number of blue shirts students own. Using simple random sampling; tell Erin how to pick out 20 subjects for the survey.

• First, divide students in the school into

  groups of Gym class. Then we randomly

  pick a few groups based upon Gym class to

  choose our sample from. Randomly (using a

  random number table), we pick out the

  same amount from each Gym class so that

  we end up with a sample of 20 subjects.

• First, make a list of students in the school.

  Next, we'll divide the number of students in

  the school by 20 to figure out how far to

  space out our choices. Next, use a random

  number table to pick our first subject. From

  that subject, count out the same amount

  each time (the number of students in the

  school divided by 20) until we have 20

  subjects.

• First, make a list of students in the school,

  and number each possible subject. Next,

  using a random number table, pick out in

  order any number between 1 and the

  number of students in the school. Continue

  picking out numbers until you have 20

  subjects. Ignore any numbers that are out of

  range in the table.

• First, divide students in the school into

  groups of their clicks (preppy, hip, etc).

  Then we use a random number table to take

  a relative amount of people (relative to the

  size of each group), making sure that we

  will end up with 20 subjects in the end.

• A

• B

• C

• D

• E

The school district is interested in finding out student and parent opinions about the dress code.  They obtain a list of students from each school in the district and put them in alphabetical order.  They then send a survey to every 25th student and their parents on the list.

• Simple Random Sampling

• Stratified Random Sampling

• Systematic Sampling

• Convenience Sampling

The school district is interested in finding out student and parent opinions about the dress code. They obtain a list of students from each school in the district and put them in alphabetical order. They then send a survey to every 25th student and their parents on the list.

• Simple Random Sampling

• Stratified Random Sampling

• Systematic Sampling

• Convenience Sampling

Involves dividing the population into subgroups, you randomly select entire subgroups. What sampling technique is this?

• Simple Random Sample

• Snowball Sample

• Cluster Random Sample

• Stratified Random Sample

A sample should be

• representative of  only middle school students only

• a very large group

• representative of the population

• representative of people who volunteer

Includes the individuals who happen to be most accessible to the researcher. What sampling technique is this?

• Stratified sampling

• Snowball sampling

• Voluntary response sampling

• Convenience sampling