A. If there is no middle bias, what proprtion of the best will be in 1 of the 12 middle numbers? b. Conduct a test at the 5% significance level to determine whether middle bias exists c. The middle of the middle are the numbers 17 and 20. If there is no middle bias, what proportion of the bets will be either 17 or 20? d. Test with a 5% significance level to determine whether middle of the middle bias exists.