Math 1 Statistics

Front

What does it mean if data is skewed right?

Back

When data is skewed right, it means that the tail on the right side of the distribution is longer or fatter than the left side. This indicates that there are a few high values that are pulling the mean to the right.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, add all the numbers in the data set together and then divide by the total number of values.

Front

What is the mean of the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7?

Back

The mean is 7.44.

Front

What does it mean if data is skewed left?

Back

When data is skewed left, it means that the tail on the left side of the distribution is longer or fatter than the right side. This indicates that there are a few low values that are pulling the mean to the left.

Front

What is a symmetric distribution?

Back

A symmetric distribution is one where the left and right sides of the distribution are mirror images of each other, meaning the mean, median, and mode are all equal.

Front

What is a uniform distribution?

Back

A uniform distribution is one where all outcomes are equally likely, meaning the frequency of each value is the same.

Front

How do you determine the percentage of students in a specific score range?

Back

To determine the percentage, divide the number of students in that score range by the total number of students, then multiply by 100.

Front

If 13 students scored in the 81-90 IQ range, what does this indicate about the data?

Back

This indicates that there is a significant number of students within that IQ range, which can be used to analyze the overall performance of the group.

Front

What happens to the mean when a new value is added to a data set?

Back

The mean can either increase, decrease, or stay the same depending on the value of the new data point relative to the existing mean.

Front

What is the median in a data set?

Back

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