Compare Dot Plots

Front

What is a dot plot?

Back

A dot plot is a statistical chart that consists of dots plotted on a number line, representing the frequency of data points.

Front

How do you identify an outlier in a dot plot?

Back

An outlier is a data point that is significantly higher or lower than the other points in the plot, often appearing isolated from the rest.

Front

What does it mean for a sample to be biased?

Back

A biased sample is one that does not accurately represent the population from which it is drawn, often due to non-random selection.

Front

What is an unbiased sample?

Back

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

Front

How do you find the median of a data set?

Back

To find the median, arrange the data points in numerical order and identify the middle value. If there is an even number of data points, average the two middle values.

Front

What is the median of the following data set: 2, 3, 4, 5, 6?

Back

The median is 4.

Front

What is the difference between two medians?

Back

The difference between two medians is the absolute value of the difference between the two middle values of their respective data sets.

Front

How do you calculate the total number of surveyed students from a dot plot?

Back

To calculate the total number of surveyed students, sum the frequencies represented by the dots in the plot.

Front

What is the importance of random sampling in surveys?

Back

Random sampling ensures that every individual has an equal chance of being selected, which helps to eliminate bias and improve the validity of the results.

Front

What does it mean if two data sets have the same median?

Back

If two data sets have the same median, it indicates that the central tendency of both data sets is the same, but it does not imply that the data sets are identical.