Population Sample Parameter Statistic Sampling Methods

A subset of population

• Parameter

• Sample

• Statistic

• Random sampling

  Complete ang entire collection of elements to be studied

• Random Sampling

• probability sampling

• convenience sampling

• population

Which term refers to a characteristic or measure that describes a population?

• a) Parameter

• b) Sample

• c) Variable

• d) Statistic

What type of sampling method involves each member of the population having an equal chance of being selected?

• a) Simple random sample

• b) Stratified sampling

• c) Systematic sampling

• d) Cluster sampling

What is the term for a subset of a population selected for a study?

• a) Parameter

• b) Sample

• c) Variable

• d) Statistic

True or False: Inferential statistics are used to make predictions and inferences about a population based on sample data.

Darren measures the heart rate of 10 randomly selected students in his Algebra 2 class. What is the population? What is the sample?

• The Algebra 2 class is the population and the 10 randomly selected students are the sample.

• The Algebra 2 class is the population and the high school is the sample.

• The Algebra 2 class is the sample and the 10 randomly selected students are the population.

• The high school is the population and the Algebra 2 class is the sample.

A census reports that the mean retirement age is 68.3 years. In a random sample, the mean retirement age is 65.8 years. What is the mean of 65.8 years?

• a parameter

• a statistic

• a variable

• a sample

A school newspaper publishes an article stating that approximately 40% of students in the school listen to classical music when studying. The newspaper explains that the poll was given to students in a randomly selected music club, where 5 of the 12 students said they listen to classical music while studying. Which statement is true?

• The findings in the article represent the entire population because the newspaper randomly selected the club for the poll.

• The findings in the article represent the entire population because approximately 40% of the students polled listen to classical music.

• The findings in the article do not represent the entire population because the club is not representative of the student population.

• The findings in the article do not represent the entire population because less than 40% of students listen to classical music.

A large high school’s athletic director wants to find out students’ opinions on several matters by surveying a random sample of the student population. Resources will allow 60 of the school’s 2,000 students to be surveyed.

Which method of choosing the student sample would allow the athletic director to draw the most valid conclusions based on survey results?

• surveying the first 15 students who arrive at school each morning for four mornings in a row during the week

• surveying the first 60 students who respond to a flyer requesting that students participate in a survey in exchange for $1

• surveying 15 male students from each grade whose numbers are drawn in a lottery in which all members of that grade are given a number and entered

• surveying 60 students whose numbers are drawn in a lottery in which all 2,000 students from the school are given a number and entered