In 2017, sales information shows that 30% of appliance sales are dryers. Smith's Appliance Depot, sold 40 appliances, 10 of them were dryers. The owner wonders if Smith's results are similar to the national sales.

Using Smith's data what is the probability of selling 10 or more dryers? Then using the national data, what is the probability of selling 10 or more dryers?Is Smith's probability higher than the national probability?Use your calculations to justify your answer to the nearest whole percent.

Hint: We are looking as successes and failures; ask yourself (1) are they independent or dependent, (2) is an interval used?