If repetition is allowed, there are choices for each entry in the password. So, by the multiplication rule Correct: Your answer is correct. , the number of passwords of length n is . Because passwords may have length 4, 5, or 6, by the addition rule Correct: Your answer is correct. , the total number of passwords consisting of 4, 5, or 6 symbols is 15943750000 Correct: Your answer is correct. .

Astudy found that the variance in the number of vehicles owned or leased by subscribers to a magazine is .094. assume a sample of 12 subscribers to another magazine provided the following data on the number of vehicles owned or leased: 1,1,1,0,3,2,1,1,2,1,0, and 1 a) compute the sample variance in the number of vehicles owned or leased by the subscribers (to 4 decimals). b)test the hypothesis to determine whether the variance in the number of vehicles owned or leased by subscribers of the other magazine differs from .calculate the value of the test statistic (to 3 decimals).