math

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1.1 Sampling

Terminology…

____________________ is the study of procedures for collecting, describing, and drawing conclusions from

information.

A ____________________ is the entire collection of individuals about which information is sought.

A ____________________ is a subset of a population, containing the individuals that are actually observed.

A ____________________ is a number that describes a sample.

A ____________________ is a number that describes a population.

Example 1: State whether the numerical summary is a statistic or a parameter.

A) An interview of 50 of the employees at Facebook found that 85% of employees were satisfied with their

working conditions.

B) After surveying each enrolled student in the course section, Dr. Dexter found that the average age of all the

75 students in your stats class is 20 years.

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1.2 Types of Data

Example 1: State whether the given variable is qualitative or quantitative. If the variable is

quantitative, state whether it is discrete or continuous. If it is qualitative, state whether it is nominal or

ordinal.

A. The weights of boxes of organic strawberries on sale at Whole Foods.

B. The number of emails you received yesterday.

C. The names of puppies in a litter. D. The length of each of Taylor Swift’s songs. 1.4 Bias Example 1: The question “How many hours did you spend studying for this quiz?” asked by the professor of each student during class could lead to (Pick the ONE answer that MOST applies) A. Sampling bias B. Nonresponse bias C. Social acceptability bias D. Leading question bias E. Self-interest bias

Example 2: The question “Are you against imprisoning animals in zoos?” (Pick the ONE answer that MOST applies) A. Sampling bias B. Nonresponse bias C. Social acceptability bias D. Leading question bias E. Self-interest bias