Stats Review with no Correlation

Front

What is the definition of median in a dataset?

Back

The median is the middle value of a dataset when it is ordered from least to greatest. If there is an even number of observations, the median is the average of the two middle numbers.

Front

How do you calculate the mean of a dataset?

Back

To calculate the mean, sum all the values in the dataset and then divide by the number of values.

Front

What is an outlier in a dataset?

Back

An outlier is a data point that differs significantly from other observations in the dataset. It can skew the results of statistical analyses.

Front

What does it mean if two datasets have the same median?

Back

It means that the middle value of both datasets is the same, indicating that half of the data points in each dataset are below this value and half are above.

Front

How can you identify an outlier using a scatter plot?

Back

An outlier can be identified as a point that lies far away from the cluster of other points in a scatter plot.

Front

What is the range of a dataset?

Back

The range is the difference between the maximum and minimum values in a dataset.

Front

What is the purpose of calculating the average number of cavities in a dental practice?

Back

Calculating the average helps to understand the overall dental health of patients and can inform treatment strategies.

Front

What is the difference between mean and median?

Back

The mean is the average of all values, while the median is the middle value when the data is sorted. The mean can be affected by outliers, while the median is more robust.

Front

How do you find the coordinates of an outlier in a scatter plot?

Back

The coordinates of an outlier are the x and y values of the point that lies far from the other points in the plot.

Front

What is the significance of the 25%, 50%, and 75% percentiles in a dataset?

Back

These percentiles divide the dataset into four equal parts, with 25% of the data below the first quartile (25%), 50% below the median (50%), and 75% below the third quartile (75%).