Introduction to statistics

The heights of all students in a particular school.

• population

• sample

The average income of a random sample of 200 employees in a company.

• population

• sample

The test scores of 15 students who participated in a study.

• population

• sample

The average temperature in a city over the past 10 years is 22°C.

• descriptive

• inferential

A survey of 500 smartphone users found that 60% prefer Android devices.

• descriptive

• inferential

A study of 1,000 randomly selected individuals found that 70% of them prefer using smartphones over traditional cell phones.

• Descriptive

• Inferential

The unemployment rate in a country is expected to decrease by 2% next year.

• descriptive

• inferential

The breeds of dogs in an animal shelter.

• qualitative

• quantitative

The colors of M&M candies in a bag.

• qualitative

• quantitative

The preferences of customers for payment methods (cash, credit card, mobile payment) at a store.

• qualitative

• quantitative