Quiz
Choose the statistic that answers the question. The mean is useful for a typical value, while range and standard deviation describe spread.
Pick how hard you want the quiz to be. The answer choices are in the question section below.
Read each question, then choose one answer.
The values 20, 26, 32, 38, 44 are the whole population for a small group. μ = 32 and Σ(x − μ)² = 360. Calculate the population standard deviation.
Population standard deviation table
Choose one answer
Weekly sales are 8, 10, 12, 15, 17. What is the median?
Weekly sales
In a standard deviation table, the mean is 17. For x = 14, complete the row: x − mean and (x − mean)².
One table row
Two community survey data sets have the same mean. Use the table to compare spread. Which conclusion is correct?
Survey summary
Use the household bills chart. Which comparison is correct?
Monthly household bills
Each bar is labelled with its value.
A shop records shoe sizes sold in one hour: 12, 10, 12, 15, 11, 12. What is the mode size?
Shoe sizes sold