4. Statistics and Probability

Descriptive Stats — Quiz

Test your understanding of descriptive stats with 5 practice questions.

Practice Questions

Question 1

A dataset contains the following 10 values: 5, 7, 8, 12, 15, 15, 17, 22, 22, 30. What is the median of this dataset?

Question 2

Which of the following best represents the interquartile range (IQR) for this dataset: 3, 5, 7, 10, 12, 14, 18, 20, 21, 25, 30?

Question 3

A boxplot for a certain dataset shows the following five-number summary: Minimum = 2, $Q_1$ = 5, Median = 8, $Q_3$ = 12, Maximum = 20. Which of the following best describes the spread of the middle 50% of the data?

Question 4

A histogram is created from a dataset of exam scores with bins of equal width. The histogram shows a clear right skew. Which of the following is most likely true about the relationship between the mean and the median of the dataset?

Question 5

A dataset has a mean of 50 and a standard deviation of 5. If a value of 65 is added to the dataset, which of the following statements is true about the new mean?