The statement represents a claim. write its complement and state which is h0 and which is h1. μ = 9.3
a) h0: μ ≠ 9.3 ; h1: μ = 9.3 (claim)
b) h0: μ = 9.3 (claim); h1: μ ≠ 9.3
c) h0: μ ≥ 9.3 (claim); h1: μ < 9.3
d) h0: μ ≤ 9.3 ; h1: μ > 9.3

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.