The Promise Seed Co. was founded in Baltimore in 1876 by a 19-year-old with a passion for plants and animals and a father willing to lend him $1,000 of “seed money” to get started in business. Today, it is owned by Tim Carlton Jr. One of Promise’s most demanded seeds is corn. Promise continues to increase production to meet the growing demand. To this end, an experiment such as the one presented here is used to determine the combination of fertilizer and seed type that produces the largest number of kernels per ear.

a. Determine if there is interaction between the type of seed and the type of fertilizer. Use a significance level of 0.05.
b. Given your findings in part a, determine if there is a difference in the average number of kernels per ear among the seeds.
c. Repeat part b for the types of fertilizer. Use a significance level of 0.05.