T11 Statistics Review Flashcard

Front

What is the definition of a survey in statistics?

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 calculate the percentage of a group?

Back

To calculate the percentage, divide the part by the whole and multiply by 100. Formula: (Part/Whole) x 100.

Front

What does IQR stand for in statistics?

Back

IQR stands for Interquartile Range, which measures the spread of the middle 50% of a data set.

Front

How do you find the IQR of a data set?

Back

To find the IQR, subtract the first quartile (Q1) from the third quartile (Q3). IQR = Q3 - Q1.

Front

What is the purpose of a box plot?

Back

A box plot visually represents the distribution of a data set, showing the median, quartiles, and potential outliers.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, using bars to show the frequency of data within certain ranges.

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, it is the average of the two middle values.

Front

What is the mode in a data set?

Back

The mode is the value that appears most frequently in a data set.

Front

What does it mean if two groups have the same percentage of data above a certain value?

Back

It means that the distribution of data points above that value is identical for both groups, indicating similar performance or characteristics.

Front

How do you interpret survey results?

Back

Survey results can be interpreted by analyzing the data to understand trends, preferences, and opinions of the surveyed population.