Statistical Concepts

Of the U.S. adult population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy. Who is the population?

• All U.S adults with allergy

• 33.2% U.S adults with allergy

• 36% U.S adults with allergy

• All U.S adults

Of the U.S. adult population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy. Who is the sample?

• 1200 selected U.S adults

• All U.S adults

• 33.2% U.S adults with allergy

• 36% U.S adults with allergy

Select 90 students currently enrolled at NCSU and ask how many years they’ve attended the university, how old they are, and if they live on campus. What is the population?

• 90 students currently enrolled at NCSU

• Students age, the duration they've attended the University and where they stayed.

• All currently enrolled students at NCSU

• All currently enrolled students in U.S

Select 90 students currently enrolled at NCSU and ask how many years they’ve attended the university, how old they are, and if they live on campus. What is the sample?

• All students currenty enrolled at NCSU

• 90 students currently enrolled at NCSU

• Students age, duration they've attended the University and where they stayed

• All students currenty enrolled at U.S

A study reveals that there are exactly 100 Senators in the 109th Congress of the United States, and 55% of them are Republicans.

Do the data comprise a sample or a population?

• Population

• Sample

Identify the population and the sample:

A survey of 1353 American households found that 18% of the households own a computer

• Population: 1353 American households, Sample: All American households

• Population: All American households, Sample:18% American households own a computer

• Population: All American households, Sample: 1353 American households

• Population: 1353 American households, Sample: All American households own a computer

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A recent survey of 2625 elementary school children found that 28% of the children could be classified obese.

• Population: 2625 elementary school children

  Sample: All elementary school children

• Population: All elementary school children

  Sample: 2625 elementary school children

• Population: All elementary school children

  Sample: 28% of children classified as obese

• Population: 2625 elementary school children

  Sample: 8% of children classified as obese

Identify the population and the sample:

The average weight of every sixth person entering the mall within a 3-hour period was 146 lb.

• Population: 6 early person entering the mall

  Sample: every 6th person entering the mall during the 3-hour period

• Population: All people in the mall during the 3-hour period Sample: 6 early person entering the mall

• Population:every 6th person entering the mall during the 3-hour period

  Sample: All people in the mall during the 3-hour period

• Population: All people in the mall during the 3-hour period Sample: every 6th person entering the mall during the 3-hour period

Identify whether the number underlined are statistic or parameter.

Of all U.S. kindergarten teachers, 32% say that knowing the alphabet is an essential skill.

• Parameter (from population)

• Statistics (from sample)

Identify whether the numbers underlined are statistics or parameters.



Of the 800 U.S. kindergarten teachers polled, 34% say that knowing the alphabet is an essential skill

• Parameter (from population)

• Sample (from sample)