Sampling and Collecting Data

This is what type of sample?

• cluster

• convenience

• systematic

• stratified

Chosen at random, 580 customers at a car dealership are contacted and asked their opinions of the service they received.
This is what type of sample?

• convenience

• stratified

• simple random sample

• cluster

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys, so she randomly selects five students from the class to survey, paying no attention to their gender.
This is a form of:

• Cluster Sampling

• Systematic Sampling

• Stratified Sampling

• Simple Random Sampling

A poll about favorite sports is taken from 100 seniors in a high school where the senior class has 575 students. 23% of respondents said that baseball was their favorite sport.
The "100" is the ______

• Sample Size

• Population Size

• Statistic

• Parameter

A _______ is a subset of individuals in the population from which we actually collect data.

• experiment

• sample

• population

• survey

A sample should be

• representative of  only middle school students only

• a very large group

• representative of the population

• representative of people who volunteer

A sample of students will be selected from all the students at a high school. Which of the following sampling methods is least likely to produce a representative sample of the students?

• From a list of all student names, randomly select 50 names from the list for the sample.

• Randomly choose five classrooms in the school and use all the students in those classrooms for the sample.

• Divide the students into the four class years (freshman, sophomore, junior, senior) and randomly select students from each year in proportion to the number of students in each year.

• From a numbered list of all student names, randomly choose a starting point and then choose every tenth student on the list.

• From a randomly chosen home basketball game, choose every tenth student who enters the gymnasium.

A random number generator is used to select 12 students from a large statistics class to rate a statistics video. The 12 students selected are

• the population.

• a simple random sample of the class.

•  a convenience sample.

• a voluntary response sample

Identify the sampling technique used: Corn is planted on a 200-acre field. The field is divided into 10-acre subplots. A sample of plants is taken from each subplot to estimate the harvest.

• Simple Random

• Stratified

• Cluster

• Systematic

A survey of 976 American households found that 32% of the households own two cars.  Identify the the sample. {hint: a survey of what __)

• All American households

• 976 American households

• 32% of Americans own two cars

• two cars