Q4.Fifty-nine percent of US adults have little confidence in their cars. You randomly select eight US adults. Find the probability that the number of US adults who have little confidence in their cars is (1) exactly three and then find the probability that it is (2) more than 6.

(1) 0.904 (2) 0.974

(1) 0.133 (2) 0.096

(1) 0.133 (2) 0.904

(1) 0.199 (2) 0.096

Q5.Say a business found that 29.5% of customers in Washington prefer grey suits. The company chooses 8 customers in Washington and asks them if they prefer grey suits. What assumption must be made for this study to follow the probabilities of a binomial experiment?

That there is a 29.3% probability of being a selected customer

That the probability of preferring grey suites is the same as preferring suits of other colors

That the probability of being a selected customer is the same for all 8 people

That those selected have similar characteristics to those in the original study

Q6.Eight baseballs are randomly selected from the production line to see if their stitching is straight. Over time, the company has found that 93.8% of all their baseballs have straight stitching. If exactly six of the eight have straight stitching, should the company stop the production line?

No, the probability of exactly six have straight stitching is not unusual

No, the probability of six or more having straight stitching is not unusual

Yes, the probability of exactly six having straight stitching is unusual

Yes, the probability of six or more having straight stitching is unusual