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(Correct Answer) MATH225N Week 1 Assignment: Sampling Methods

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1.Question

You want to find the average test score of the students in every math class in 11th grade. There are 15 math classes in 11th grade. You survey the scores of 7 math classes, and you calculate that the average test score is 83%.

Which of the following represent the sample and the parameter in this scenario?

Select the correct answer below:

  • Sample: 7 math classes
  • Parameter: the average test score of 83%
  • Sample: 15 math classes
  • Parameter: The parameter is unknown.
  • Sample: 15 math classes
  • Parameter: the average test score of 83%

2.Question

Angela wants to estimate the mean number of siblings for each student in her school. She records the number of siblings for each of 200 randomly selected students in the school. What is the data?

Select the correct answer below:

  • the mean number of siblings for all students in the school
  • the mean number of siblings for the randomly selected students
  • the specific number of siblings for each randomly selected student
  • all the students in the school
  • the 200 randomly selected students

3.Question

Patrick wants to estimate the percentage of parents who use cloth diapers. He asks a randomly selected group of 125 parents whether or not they use cloth diapers. What is the statistic?

  • the 125 people surveyed
  • the percentage of all parents who use cloth diapers
  • the percentage of surveyed parents who use cloth diapers
  • all parents who use cloth diapers
  • specific “yes” or “no” responses to the survey

4.Question

Sharon wants to estimate the percentage of parents who use cloth diapers. She asks a randomly selected group of 75 parents whether or not they use cloth diapers. What is the population?

Select the correct answer below:

  • the 75 people surveyed
  • specific “yes” or “no” responses to the survey
  • the percentage of surveyed parents who use cloth diapers
  • the percentage of all parents who use cloth diapers
  • all parents

5.Question

Douglas wants to estimate the percentage of homeowners that own at least one dog. He surveys 125 randomly selected homeowners to determine whether or not they own dogs. What is the statistic?

Select the correct answer below:

  • the percentage of surveyed homeowners who own at least one dog
  • specific responses to the survey
  • the percentage of all homeowners who own at least one dog
  • the 125 homeowners surveyed
  • all homeowners

6.Question

Raymond wants to estimate the percentage of parents who use cloth diapers. He asks a randomly selected group of 200 parents whether or not they use cloth diapers. What is the data?

Select the correct answer below:

  • the percentage of all parents who use cloth diapers
  • the 200 people surveyed
  • all parents who use cloth diapers
  • the percentage of surveyed parents who use cloth diapers
  • specific “yes” or “no” responses to the survey

 7.Question

Thomas wants to estimate the mean height of students attending his college. He records the heights of 25 randomly selected students attending the college. What is the parameter?

Select the correct answer below:

  • the heights of the randomly selected students
  • the mean height of all students attending the college
  • the mean height of the randomly selected students
  • the 25 randomly selected students
  • all the students attending the college

8.Question

Raymond wants to estimate the percentage of parents who use cloth diapers. He asks a randomly selected group of 200 parents whether or not they use cloth diapers. What is the parameter?

Select the correct answer below:

  • the percentage of surveyed parents who use cloth diapers

the 200 people surveyed

  • specific “yes” or “no” responses to the survey
  • the number of parents
  • the percentage of all parents who use cloth diapers

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