9. Find the indicated probability. The brand name of a certain chain of coffee shops has a 58% recognition rate in the town of Coffleton. An executive from the company wants to verify the recognition rate as the company is interested in opening a coffee shop in the town. He selects a random sample of 9 Coffleton residents. Find the probability that the number that recognize the brand name is not 4. 0 0.0900 0 0.00148 0 0.186 0 0.814 10.Find the indicated probability. A multiple choice test has 7 questions each of which has 4 possible answers, only one of which is correct. If Judy, who forgot to study for the test, guesses on all questions, what is the probability that she will answer exactly 3 questions correctly? 0.0156 0 0.311 0 0.173 0 0.827 11.Find the indicated probability. In a survey of 300 college graduates, 57% reported that they entered a profession closely related to their college major. If 6 of those survey subjects are randomly selected without replacement for a follow-up survey, what is the probability that 3 of them entered a profession closely related to their college major? 0 0.294 0 0.706 0 0.167 0 0.185 12. Find the indicated probability. Round to three decimal places. A test consists of 10 true/false questions. To pass the test a student must answer at least 7 questions correctly. If a student guesses on each question, what is the probability that the student will pass the test? 0 0.117 0 0.055 0 0.172 0.945 13. The probability is 0.4 that a person shopping at a certain store will spend lessthan $20. For groups of size 21, find the mean number who spend less than $20 0 8.0 0 8.4 O 12.0 O 12.6 14.On a multiple choice test with 21 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the standard deviation for the number of correct answers. O 15.5 O 39.4 0 3.9 02 15.In a certain town, 48% of voters favor a given ballot measure bor groups of 20 voters, find the variance for the number who favor the measure. 05 0 9.6 O 2.2 O 24.9 16. Determine if the outcome is unusual. Consider as unusual any result that differs from the mean by more than 2 standard deviations. That is, unusual values are either less than u - 20 or greater than u + 20. The Acme Candy Company claims that 60% of the jawbreakers it produces weigh more than ,4 ounces. Suppose that 800 jawbreakers are selected at random from the production lines. Would it be unusual for this sample of 800 to contain 478 jawbreakers that weigh more than .4 ounces? O Yes O No
