According to a recent report, people smile an average of μ = 62 times per day. Assuming that the distribution of smiles is approximately normal with a standard deviation of sigma σ =18, What proportion of people smile less than 80 times a day?

Alogical argument that is presented in graphical form using boxes and arrows is called?

Is the figure congruent? yes or no?

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.