Descriptive Statistics
Figure 1
{Copyright Allison
Horst}
Figure 2

Figure 3

Figure 4
Or even specify the exact intervals we want, here intervals from 0 to
6500 gram in intervals of 250 gram:
Figure 5
The histogram provides us with a visual indication of both range, the
variation of the values, and an idea about where the data is
located.
Figure 6

Figure 7

Tidy Data
Figure 1

Figure 2

Figure 3

The normal distribution
Figure 1

Figure 2
The area under the curve is 1,
equivalent to 100%.
Figure 3

Testing for normality
Figure 1

Figure 2

Figure 3

Figure 4

Linear regression
Figure 1

Figure 2

Figure 3

Figure 4
They are relatively close to normal.