Chapter #5 - Collecting Data

Which of the following is not a valid sampling method?

• Order data from highest to lowest, randomly select one item, and then choose every fifth value after that

• Put all of the data into a bin and randomly select 50

• Arrange the data into demographic groups and pick 100 from one of the groups

• Send out a survey and ask people to fill it out and send it back

Which of the following conditions is not a characteristic of a good experiment?

• Randomization of the groups selected for the study

• Control of as many aspects of the experiment as possible

• Homogeneous group selection

• Replication of the experiment

People prone to migraine headaches are randomly divided into two groups. One group gets a new headache remedy to try out and the other does not. One hour later, the participants are asked about their headaches. This is an example of:

• An observational study

• An experimental study

• A combinations study

• A permutations study

A teacher compares class averages between her two data management classes to determine whether the one in the morning performs better than the one in the afternoon. This is an example of:

• An observational study

• An experimental study

• A combinations study

• A permutations study

A leading question in a survey question is:

• the beginning stem of a question that precedes the options being presented

• a question that gives options that overlap each other so a clear choice is not obvious

• a question that is phrased in a way that it could influence the way the respondent may answer it

• a question that is given choices on a Likert scale

Bias in survey results can occur when

• the questions in the survey are prejudiced for or against an idea or response

• the sample surveyed is not selected randomly

• the data collection technique is flawed

• all of the above

Which of these is a good survey question?

• Where do you get most of your information on video games and movies?

  - Friends

  - Game Store

  - Internet

  - TV

• Should formula sheets be allowed on math exams?

  - Strongly agree

  - Agree

  - Don't know

  - Disagree

  - Strongly disagree

• Which uniforms do you prefer for the football team, the new modern style or the old style?

  - New

  - Old

• What is your favourite sport?

  - Soccer

  - Tennis

  - Volleyball

  - Golf

Is a histogram the same as a bar graph?

• Yes, because they both use intervals.
• No, because a histogram displays numerical data while a bar graph displays categorical data.
• Yes, because they both use bars to display data.
• No, because a histogram displays categorical data while a bar graph displays numerical data.

How many cities have temperatures between 70 degrees and 99 degrees?

• 44
• 34
• 26
• 62

Elliot says almost everyone arrived at the party after 10:00 P.M., but Nancy thinks most people came earlier. When did a majority of the people arrive? 

• 7:00-7:59 P.M.
• 8:00–8:59 P.M.
• 9:00–9:59 P.M.
• 10:00–10:59 P.M.