Bags of sugar come in 3 sizes. Small bag: A 225 g bag costs 88p.
Medium bag: A 550 g bag costs £2.27.
Large bag: A 1.1 kg bag costs £4.22.

Find the cost per gram for each bag of sugar.
Round your answers to 3dp.

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.