Basic Statistics Review for Flex

How do you find the median of a set of numbers?

• Arrange the numbers in order and find the middle value. If there is an even number of values, average the two middle numbers.

• Add all the numbers together and divide by the total count.

• Select the largest number in the set as the median.

• Choose the smallest number in the set as the median.

What is the median in statistics?

• The average of a set of numbers.

• The middle value in a set of numbers when they are arranged in order.

• The highest value in a set of numbers.

• The lowest value in a set of numbers.

What is the interquartile range (IQR)?

• The average of the first and third quartiles.

• The difference between the first quartile (Q1) and the third quartile (Q3) in a data set.

• The median of the data set.

• The range of the entire data set.

How do you calculate the mean of a set of numbers?

• Add all the numbers together and divide by the total number of values.

• Multiply all the numbers together and divide by the total number of values.

• Subtract the smallest number from the largest number.

• Take the median of the set of numbers.

What does it mean if a graph is skewed right?

• A right-skewed graph has a longer tail on the right side, indicating that most values are concentrated on the left.

• A right-skewed graph has a longer tail on the left side, indicating that most values are concentrated on the right.

• A right-skewed graph has equal tails on both sides, indicating a normal distribution of values.

• A right-skewed graph has no tails, indicating that all values are concentrated in the middle.

What is a data set?

• A data set is a collection of unrelated values.

• A data set is a collection of related values or observations.

• A data set is a single value or observation.

• A data set is a type of software used for data analysis.

What is the mean in statistics?

• The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the total count of numbers.

• The mean is the middle value in a data set when arranged in ascending order.

• The mean is the most frequently occurring number in a data set.

• The mean is the difference between the highest and lowest values in a data set.

What is the first quartile (Q1)?

• The first quartile (Q1) is the median of the lower half of a data set.

• The first quartile (Q1) is the average of the highest and lowest values in a data set.

• The first quartile (Q1) is the value that separates the highest 25% of the data from the rest.

• The first quartile (Q1) is the median of the entire data set.

How do you calculate the interquartile range?

• Multiply the first quartile (Q1) by the third quartile (Q3).

• Add the first quartile (Q1) to the third quartile (Q3).

• Subtract the first quartile (Q1) from the third quartile (Q3).

• Divide the third quartile (Q3) by the first quartile (Q1).

What is a uniform distribution?

• A distribution where all outcomes are equally likely, resulting in a flat graph.

• A distribution that shows a bell-shaped curve with most outcomes clustering around the mean.

• A distribution where outcomes are skewed to one side, showing a long tail.

• A distribution that has a single peak, indicating the most common outcome.