Exercise

# Exploring Anscombe

In 1973, Francis Anscombe famously created four datasets with remarkably similar numerical properties, but obviously different graphic relationships. The `Anscombe`

dataset contains the `x`

and `y`

coordinates for these four datasets, along with a grouping variable, `set`

, that distinguishes the quartet.

It may be helpful to remind yourself of the graphic relationship by viewing the four scatterplots:

```
ggplot(data = Anscombe, aes(x = x, y = y)) +
geom_point() +
facet_wrap(~ set)
```

Instructions

**100 XP**

For each of the four `set`

s of data points in the `Anscombe`

dataset, compute the following in the order specified. Names are provided in your call to `summarize()`

.

- Number of observations,
`N`

- Mean of
`x`

- Standard deviation of
`x`

- Mean of
`y`

- Standard deviation of
`y`

- Correlation coefficient between
`x`

and`y`