Need help with practice questions.

Multiple-Choice Section: Circle the correct answer. Each question is worth 5 points. 1. A teacher wants to know how many minutes students take on their homework. The minutes worked and how many problems on the homework is shown below. Minutes 10 15 30 36 43 Number of 1 18 23 28 37 45 55 problems Determine the equation of the regression line and predict the value of how many problems the students can do in 12 minutes. togun a. D = -9.182 + 1.523x, 9 problems b. D = -1.52 + 9.182x, can't predict C. D = 6.577 + 0.639x, 16 problems d. D = 0.639 +6.577x, can't predict 2. In a simple random survey of 89 teachers of Statistics, 73 said that it was the most satisfying, most enjoyable course they had every taught. Establish a 98% confidence interval estimate of the proportion of all Statistics teachers who feel this way. T a. (0.597, 1.043) .0 b. (0.726, 0.915) I gaiwollol edi bris from off C. (0.736, 0.904) d. (0.779, 0.861) 01.D. 29 e. (0.816, 0.824) 81.1 -0.2.5 - 4 1es.1 = 0 .2.s H 3. If 5 players out of 1 1 are selected to be on a basketball team, how many different teams can be formed? a. 55 Of aidon b. 120 following are true statements? a II only and !) usam out ordi to amnioq Ol S nitblew 4. The chance that any one telephone line is busy at Acme Corp. at a given moment of time is 0.15. What is the probability that out of 5 telephone lines, less than 3 lines are busy. a. 0.003 b. 0.027 $82 .b C. 0.973 d. 0.998