Marianne wanted to know students' opinion on the new schedule at school. She survey's the first 30 students who come into her class.

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She selects the first five who raise their hands.

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She selects the five closest to her desk.

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She picks the student in every 5th seat.

An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 1 block and survey all households on that block.

This is an example of:

A teacher hands out an index card and asks ALL of her students in one of her randomly selected classes to write down the following information: age, height (in inches), and what grade they are in.

Which of the following best describes her method of data collection?

A teacher wants to know how well her students are doing on a topic. She randomly picks one class to survey.

A teacher splits her classes up by period. She then randomly picks 3 students from each period to do a survey.

Which measure of central tendency should we use?

What is the relationship between the mean and the median?

What is the shape of the distribution?

What is the relationship between the mean and the median?

Which measure of central tendency should we use?

What is the shape of the distribution?

What is the relationship between the mean and the median?

Which measure of central Tendency should we use?

A researcher randomly assigned students to two groups. One group was assigned to watch a violent television program while the other group watched a nonviolent program. The student's behavior was then recorded for incidences of aggressive behavior. Which research method is most appropriate?

Dr. Larson was interested in whether classical music helps students perform better on a test. Dr. Larson randomly assigned half of the study's participants to a group that listened to classical music while taking a test. The other half of the participants did not listen to music while taking a test. Which research method is most appropriate?

Jane Goodall lived among wild chimpanzees intermittently for decades, studying their social and family systems while keeping her interaction with the chimpanzees to a minimum. Which research method is most appropriate?

A psychologist designed a study to test the effects of cell phone use on driving safety. Participants were randomly assigned either to drive an automobile simulator while talking to a friend on a cell phone or to drive a simulator without talking on a phone.

Which type of research does the scenario describe?

A researcher stood at a school parking lot entrance to see if the color of a car is related to the driver not wearing a seat belt.

Which research method is most appropriate?

What is the best way to select a representative sample of potato chips from a factory's production?

Why is random selection important in obtaining a representative sample?

A researcher took a random sample of 50 people and asked them if they regularly exercised. They all reported to a clinic to have their cholesterol measured.

You want to know your town’s favorite fast-food restaurant. You randomly ask 30 people their preference as they leave a McDonald’s restaurant.

Is the survey biased or unbiased?

To represent all students attending a school, the principal surveys the students in one math class.

Is the survey biased or unbiased?

Each student's name is written on a piece of paper. The names are placed in a bowl, and names are picked without looking.

Is the survey biased or unbiased?

Every 20th person is chosen from an alphabetical list of all students attending a school.

Is the survey biased or unbiased?

Customers at a music store are surveyed about what they like to do in their free time.