Algebra - Chapter 4.5 Flashcard Review

Front

What is the definition of a mean in statistics?

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 the definition of standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, sum all the numbers in the data set and divide by the total count of numbers.

Front

What does it mean if a sample is biased?

Back

A biased sample is one that does not accurately represent the population from which it is drawn, leading to skewed results.

Front

What is an unbiased sample?

Back

An unbiased sample is one that fairly represents the population, allowing for accurate conclusions to be drawn.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within specified ranges.

Front

What does the interval 15-19 represent in a histogram?

Back

The interval 15-19 represents the range of values from 15 to 19, indicating how many data points fall within this range.

Front

How do you determine the total number of students represented in a histogram?

Back

To determine the total number of students, sum the frequencies of all intervals shown in the histogram.

Front

What is the significance of the term 'snowstorms of note'?

Back

The term 'snowstorms of note' refers to significant snowfalls, specifically those exceeding 6 inches.

Front

How do you find the population standard deviation?

Back

To find the population standard deviation, calculate the square root of the variance, which is the average of the squared differences from the mean.