Exploring Algebra I Keystone Concepts #80 - 85

The video tutorial covers statistical concepts such as median, quartiles, and interquartile range using box and whisker plots. It explains how to calculate the range and interquartile range of a data set. The tutorial also demonstrates predicting survey outcomes using proportions and bar graphs. Finally, it teaches how to find the median using a stem-and-leaf plot.

What does the interquartile range represent in a dataset?

• Difference between the highest and lowest data points

• Average of all data points

• Sum of all data points

• Range between the first and third quartiles

If the median temperature is 62 degrees, what does this imply about the dataset?

• None of the temperatures are below 62 degrees

• 62 is the highest temperature recorded

• 62 is the lowest temperature recorded

• 50% of the temperatures are below 62 degrees

How is data divided in a box-and-whisker plot?

• Into 4 equal parts based on number of data points

• Into 4 equal parts based on range

• Randomly

• Into 100 equal parts

What is the range of a set of numbers if the maximum is 46 and the minimum is 23?

• 19

• 46

• 69

• 23

How do you find the inner quartile range of a dataset?

• Multiply the first and third quartiles

• Add the first and third quartiles

• Average the first and third quartiles

• Subtract the third quartile from the first quartile

What is the correct way to calculate the range of a dataset?

• Sum of maximum and minimum values

• Average of maximum and minimum values

• Minimum value minus maximum value

• Maximum value minus minimum value

Based on a survey, if 50 out of 200 students chose football, how many out of 80 new students are likely to choose football?

• 20

• 25

• 30

• 35

How many more students chose basketball over football in the survey prediction?

• 20

• 5

• 15

• 10

What is the median of a dataset if the two middle values are 24 and 24?

• 12

• 48

• 24

• 23

In a stem-and-leaf plot, what does '1 | 3' represent?

• 13

• 3

• 10

• 1