From midnight to 7: 00 am, the temperature dropped 1.35 degrees celsius each hour. if the temperature at midnight was 10 degrees celsius, what was the temperature at 7: 00am?

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.