Describing Data

Front

What is standard deviation?

Back

The deviation or difference from the mean for a group as a whole.

Front

Why bother calculating the standard deviation after obtaining the variance?

Back

Because it provides a more useful measure since it is converted into the same units as the data you are studying.

Front

Why are descriptive statistics important?

Back

They describe and organize data.

Front

Describe what the mean mathematically means.

Back

Mean is the sum of data divided by N.

Front

Why is the range a poor measure of variability?

Back

Because it includes only the two most extreme numbers, which can make it seem like there is far more variation than there actually is.

Front

Which of these graphs show a negative skew? Options: 1, 2

Back

2

Front

What is the mean of the following set of numbers: 8, 12, 15, 10, 5?

Back

10

Front

Which of the following is not a measure of central tendency? Mean, Median, Mode, Range

Back

Range

Front

Given the heights (in cm) of 6 plants: 15, 20, 25, 30, 35, 40 what is the range of their heights?

Back

25

Front

What is the definition of Median?

Back

The number in the middle of an ordered list