SPIRAL REVIEW #3

Front

What is relative frequency?

Back

Relative frequency is the ratio of the number of times an event occurs to the total number of trials or observations. It is often expressed as a percentage.

Front

How do you calculate the percentile of a value in a data set?

Back

To calculate the percentile of a value, you determine the number of values in the data set that are less than the given value, divide that number by the total number of values, and then multiply by 100.

Front

What is the standard normal distribution?

Back

The standard normal distribution is a normal distribution with a mean of 0 and a standard deviation of 1. It is used to find probabilities and percentiles for normally distributed data.

Front

What does the 68-95-99.7 rule state?

Back

The 68-95-99.7 rule states that in a normal distribution, approximately 68% of the data falls within one standard deviation of the mean, 95% falls within two standard deviations, and 99.7% falls within three standard deviations.

Front

How do you interpret a dot plot?

Back

A dot plot is a simple way to display data where each value is represented by a dot. It allows you to see the distribution of data points and identify trends or patterns.

Front

What is the mean in a data set?

Back

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

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values. A low standard deviation indicates that the values tend to be close to the mean, while a high standard deviation indicates that the values are spread out over a wider range.

Front

What is a survey?

Back

A survey is a method of collecting data by asking people questions to gather information about their preferences, opinions, or behaviors.

Front

How do you find the percentage of a specific value in a data set?

Back

To find the percentage of a specific value, divide the number of occurrences of that value by the total number of values in the data set and multiply by 100.

Front

What is a dot plot used for?

Back

A dot plot is used to display the frequency of data points in a small data set, making it easy to visualize the distribution and identify modes.