Use the Following Information for Questions:
12 Corn Plants $\overline{x_1}$

Multiple Choice

Use the following information for questions:
12 corn plants were randomly assigned to one of four plots of land (3 plants in each plot) , and the mean heights of the plants were compared for the four plots using one-way analysis of variance. The mean square error (MS Error) was 20. The average height of the corn plants in the first plot was $\overline{x_1}$ = 60 inches.
-What are the degrees of freedom for the t^* multiplier for a confidence interval for $µ_1$ the average height of corn plants grown in the first plot?

A) 8
B) 12
C) 20
D) None of the above