Choose An Answer For Each Following Problem Which Of The Fol

Choose An Answer For Each Following Problemwhich Of The Following

Choose an answer for each following problem. Which of the following is a continuous quantitative (numerical) variable? a) The number of books in a library b) The color of a student’s eyes c) The distance you drove yesterday. d) The number of employees of an insurance company. The coefficient of correlation between two continuous variables (a) Can be any real value (b) Must be between -1 and +1 (c) Must be non-negative (d) Must be positive. Suppose that patrons of a restaurant were asked whether they preferred water of whether that preferred soda 70% said that they preferred water. 60% of the patrons were male. 80% of the males preferred water. Suppose a randomly selected patron prefers soda. Then the probability the patron is a male is . The following is NOT a reason for the need for sampling? (a) It is sometimes destructive to observe the entire population. (b) It is usually too costly to study the whole population. (c) It is usually too time-consuming to look at the whole population. (d) It is always more informative by investigating a sample than the entire population. The opportunity for sampling error is decreased by: (a) larger sample sizes (b) affluent samples (c) smaller sample sizes (d) educated samples. A bag contains 52 balls. 13 of them are Blue, 13 of them are Green, 13 of them are Red and 13 of them are Yellow. 6 balls are drawn from the bag successively at random and without replacement. Let ð´ be the event of two Blues appears in the first five draws. Let ðμ be the event of a Blue on the sixth draw. The probabilities of the two events are known as ð‘ƒ{ð´} = 0.274280 and ð‘ƒ{ðµ|ð´} = 0.234043. What is the probability that the third Blue appears on the sixth draw? A service station owner sells Goodroad tires, which are ordered from a local tire distributor. The distributor receives tires from two plants, A and B. When the owner of the service station receives an order from the distributor, there is a .50 probability that the order consists of tires from plant A or plant B. However, the distributor will not tell the owner which plant the tires come from. The owner knows that 20% of all tires produced at plant A are defective, whereas only 10% of the tires produced at plant B are defective. When an order arrives at the station, the owner is allowed to inspect it briefly. The owner takes this opportunity to inspect one tire to see if it is defective. If the owner believes the tire came from plant A, the order will be sent back. Determine the probability that a tire is from plant A, given that the owner finds that it is defective. The editor of a textbook publishing company is trying to decide whether to publish a proposed business statistics textbook. Information on previous textbooks published indicates that 10% are huge successes, 20% are modest successes, 40% break even, and 30% are losers. However, before a publishing decision is made, the book will be reviewed. In the past, 99% of the huge successes received favorable reviews, 70% of the moderate successes received favorable reviews, and 40% of the break-even books received favorable reviews, and 20% of the losers received favorable reviews. a. What proportion of textbooks receive favorable reviews? b. If the proposed textbook receives a favorable review, what is the probability that it is huge success? c. If the proposed textbook receives a favorable review, what is the probability that it is moderate success? d. If the proposed textbook receives a favorable review, what is the probability that it is break even? A survey of 40 adults asked, “Do you enjoy shopping for clothing for yourself?â€. The results indicated that 63% of the females enjoyed shopping for clothing for themselves as compared to 43% of the males. The sample sizes of males and females were not provided. Suppose that the results indicated that of 21 males, 9 answered yes. Of 19 females, 12 answered yes. What is the probability that a respondent chosen at random is a female or is a person who enjoys shopping for clothing? How do the ratings of TV and Internet services compare? The following table contain the rating of 7 different providers. Let X and Y be the variables for the ratings of TV and Internet services, respectively. Compute the sample means of the TV and Internet service ratings. Compute the sample standard deviations of TV and Internet service ratings. What is the sample covariance between the TV service rating and the Internet service rating? Given the sample dataset, what is the sample correlation coefficient between the TV service rating and the Internet service rating? Based on the TV service rating in the sample data, can you consider Provider G as an outlier? Explain. Assume that the population parameters about the distribution of the TV service rating are known as the mean of 71 and the standard deviation of 5. Based on the population information, can you consider Provider F as an outlier? Explain. Consider the following sample: 20, 23, 21, 21, 30, 19, 26, 23, 25, 60 a. Compute the mean, median, and mode. b. Compute the Z-scores. Are there any outliers? c. List the five-number summary. d. Construct a boxplot and describe its shape.