Unit 7 Flashcard

Front

What is the Interquartile Range (IQR)?

Back

The Interquartile Range (IQR) is a measure of statistical dispersion, representing the range between the first quartile (Q1) and the third quartile (Q3) in a data set. It indicates the middle 50% of the data.

Front

How do you calculate the range of a data set?

Back

The range is calculated by subtracting the smallest value in the data set from the largest value. For example, in the heights of players, if the tallest is 70 inches and the shortest is 62 inches, the range is 70 - 62 = 8 inches.

Front

What is the mode in a data set?

Back

The mode is the value that appears most frequently in a data set. For example, in the data set {1, 2, 2, 3, 4}, the mode is 2.

Front

What is the median of a data set?

Back

The median is the middle value when a data set is ordered from least to greatest. If there is an even number of observations, the median is the average of the two middle numbers.

Front

What is the mean of a data set?

Back

The mean is the average of all values in a data set, calculated by adding all the values together and dividing by the number of values.

Front

What is an outlier in a data set?

Back

An outlier is a value that is significantly higher or lower than the other values in a data set. It can skew the results of statistical measures.

Front

How does removing an outlier affect the mean and median?

Back

Removing an outlier typically decreases the mean, as it is sensitive to extreme values, while the median may remain unchanged or change slightly, as it is less affected by outliers.

Front

What is the purpose of calculating the percent of a data set?

Back

Calculating the percent of a data set helps to understand the proportion of a specific group within the whole. For example, if 25 out of 100 students are between 58 and 60 inches tall, that represents 25%.

Front

What does it mean if two data sets have the same IQR?

Back

If two data sets have the same IQR, it means that the spread of the middle 50% of the data is the same, indicating similar variability in the central portion of the data.

Front

How do you find the total number of items sold over multiple days?

Back

To find the total number of items sold over multiple days, simply add the number of items sold each day together. For example, if 5 cars were sold on Monday and 6 on Tuesday, the total is 5 + 6 = 11.