Use R to repeat Exercises 12.1 and 12.2. (The code for this exercise can be found on the chapter’s Web page along with other pieces of code. This code will generate its own set of 100 random observations and its own set of means of 5 observations.)

Exercise 12.2

I drew 50 samples of five scores each from the same population that the data in Exercise 12.1 came from, and calculated the mean of each sample. The means are shown below. Plot the distribution of these means.

Exercise 12.1

The following numbers represent 100 random numbers drawn from a rectangular population with a mean of 4.5 and a standard deviation of 2.6. Plot the distribution of these digits.

(They are available as a text file in the data files on the Web.)

Transcribed Image Text:

1.0 4.6 3.8 2.6 4.0 4.8 5.6 6.4 3.4 5.4 5.2 7.2 4.4 5.2 4.0 2.6 5.2 4.0 5.6 3.4 3.2 4.4 4.8 3.8 2.8 6.2 4.4 5.0 6.6 4.6 6.2 4.6 5.4 2.6 4.4 4.2 3.6 4.6 4.4 5.0 4.4 2.8 3.8 4.6 5.4 4.6 2.4 5.8 4.6 4.8