Stats Review 1.1-1.3

Front

What are characteristics that are defined by a number, such as age or weight?

Back

Numerical variables are characteristics that can be measured and expressed numerically, such as age, weight, height, and temperature.

Front

What is the word in statistics for any characteristic or attribute of a person, place, or thing?

Back

A variable is any characteristic, number, or quantity that can be measured or counted.

Front

What is the mistake in the bar graph if the scale does not start at zero?

Back

When a bar graph does not start at zero, it can misrepresent the data, making differences appear larger than they are.

Front

What is the difference between descriptive statistics and inferential statistics?

Back

Descriptive statistics summarize and describe the features of a dataset, while inferential statistics use a random sample of data to make inferences about a larger population.

Front

What is a categorical variable?

Back

A categorical variable is a variable that can take on one of a limited, and usually fixed, number of possible values, assigning each individual or other unit of observation to a particular group.

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 certain ranges.

Front

What does a bar graph represent?

Back

A bar graph represents categorical data with rectangular bars, where the length of each bar is proportional to the value it represents.

Front

What is the purpose of a circle graph (pie chart)?

Back

A circle graph, or pie chart, is used to represent data in a circular format, showing the relative sizes of parts to a whole.

Front

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

Back

To determine the total number of students in a histogram, sum the frequencies of all the bins.

Front

What is the importance of consistent scales in graphs?

Back

Consistent scales in graphs ensure accurate representation of data, allowing for valid comparisons between different data sets.