Math IA - Unit 6 Review (1st) 12/12

Front

What is a misleading graph?

Back

A misleading graph is one that presents data in a way that can lead to incorrect interpretations. For example, a graph that does not start its y-axis at zero can exaggerate differences.

Front

What is a biased sample in surveys?

Back

A biased sample is a type of survey sample where one portion of the population is favored over another, leading to skewed results.

Front

What is an unbiased sample in surveys?

Back

An unbiased sample is a type of survey sample where the entire population is equally represented, ensuring fair and accurate results.

Front

How do you find the lower quartile of a data set?

Back

To find the lower quartile (Q1), arrange the data in ascending order and find the median of the lower half of the data.

Front

What is the median of a data set?

Back

The median is the middle value of a data set when arranged in ascending order. If there is an even number of observations, it is the average of the two middle numbers.

Front

What is the importance of starting the y-axis at zero in graphs?

Back

Starting the y-axis at zero is important to accurately represent the data and avoid misleading interpretations of the differences between values.

Front

How do you calculate the median of the following data set: 200, 100, 90, 140?

Back

Arrange the data in ascending order: 90, 100, 140, 200. The median is the average of the two middle numbers: (100 + 140) / 2 = 120.

Front

What is the role of quartiles in data analysis?

Back

Quartiles divide a data set into four equal parts, helping to understand the distribution and spread of the data.

Front

What is the difference between a population and a sample in statistics?

Back

A population includes all members of a defined group, while a sample is a subset of the population used to represent the whole.

Front

What is the significance of the y-axis in a graph?

Back

The y-axis represents the dependent variable in a graph, showing how it changes in relation to the independent variable on the x-axis.