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Thirty-five percent of US adults have little confidence in their cars. You randomly select ten US adults.
Thirty-five percent of US adults have little confidence in their cars. You randomly select ten US adults. Find the probability that the number of US adults who have little confidence in their cars is (1) exactly six and then find the probability that it is (2) more than 7.
(1) 0.069 (2) 0.974
(1) 0.069 (2) 0.005
(1) 0.021 (2) 0.005
(1) 0.021 (2) 0.026
Say a business wants to know if each salesperson is equally likely to make a sale. The company chooses 5 salespeople and gathers information on their sales experiences. What assumption must be made for this study's probability results to be used in future binomial experiments?
That for every 5 salespeople, the probability of making a sale is the same
That the probability of each salesperson being one of the selected 5 is the same
That 5% is the correct probability to use in future studies
That the selected 5 have similar characteristics and sales areas as the other salespeople