Franklin is purchasing replacement equipment for outdoor recess. Mr. DiCanio put in a order totaling $97.23 to purchase 4 playground balls for $17.25 each, a
package of 10 jump ropes for $18.75, and 1 Nerf football. How much did the Nerf
football cost?

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.