1 Not yet answered Points out of 4.00 Flag question Question text "Tom's SUV rolled over. Therefore, SUVs are dangerous." Which of the following fallacy does this statement best illustrate? Select one: a. Confusing significance with importance. b. Interpreting a correlation as a causal link. c. Making conclusions about the population from a small sample. d. Generalizing from an average to an individual. Question 2 Not yet answered Points out of 4.00 Flag question Question text True or False? A population can be divided into several groups, where the within group variations are small but the cross group variations are large. The proper sampling method applied to this population is convenience sampling. Select one: True False Question 3 Not yet answered Points out of 4.00 Flag question Question text If you have 33 data observations in a sample, how many classes (bins) does the Sturges' Rule recommend for you to construct a frequency distribution table? Select one: a. 8 b. 9 c. 6 d. 4 Question 4 Not yet answered Points out of 4.00 Flag question Question text True or False? It is inappropriate to apply the Chebyshev's theorem to a population that is left skewed. Select one: True False Question 5 Not yet answered Points out of 4.00 Flag question Question text True or False? When two events are mutually exclusive and collectively exhaustive, then it must be the case that one event is the complement of the other. Select one: True False Question 6 Not yet answered Points out of 4.00 Flag question Question text Use the contingency table below to calculate . Select one: a. 0.2500 b. 0.6250 c. 0.7500 d. 0.1250 Question 7 Not yet answered Points out of 4.00 Flag question Question text True or False? There is a 30% chance that a car's service time is considered \"late\" in a quick oil change shop in Boone. Suppose this shop services in total 5 cars today. Define a new random variable X the number of cars with \"late\" service today. Then the probability that none of the 5 cars are serviced \"late\" P(X=0) is 0.168. Select one: True False Question 8 Not yet answered Points out of 4.00 Flag question Question text When you send out a resume, the probability of being called for an interview is 0.20. What is the probability that the first interview occurs on the fourth resume that you send out? Select one: a. 0.4096 b. 0.0016 c. 0.2410 d. 0.1024 Question 9 Not yet answered Points out of 4.00 Flag question Question text The time required for a citizen to complete a 2000 U.S. Census \"long\" form is normally distributed with a mean of 40 minutes and a standard deviation of 10 minutes. Use the C2 table below to find the probability that a randomly selected citizen will need less than 58 minutes to complete a \"long\" form. Select one: a. 0.9641 b. 0.9656 c. 0.9772 d. 0.9713 Question 10 Not yet answered Points out of 4.00 Flag question Question text A company has 300 employees. Each year, there is a 30% turnover rate for the employees. The total number of employees who leave each year follows a binomial distribution. Now, we want to use the normal approximation to this binomial distribution. Then in this normal distribution, the mean is ______ and the standard deviation is _____. Select one:aqq a. 90, 63 b. 90, 7.937 c. 63, 30 d. 30, 15 Question 11 Not yet answered Points out of 4.00 Flag question Question text Between 2 and 4 PM on Wednesday, patient insurance inquiries arrive at Blue Choice insurance with a mean rate of 2.6 calls per minute. What is the probability of waiting more than 1.5 minutes to get the next inquiry call? Select one: a. 0.2564 b. 0.0122 c. 0.0535 d. 0.0202 Question 12 Not yet answered Points out of 4.00 Flag question Question text A consistent estimator (such as the sample mean) for the population mean Select one: a. converges to the population mean as the sample size increases. b. converges to the population mean as the sample variance increases. c. consistently follows a continuous uniform distribution. d. is impossible to calculate using any random sample. Question 13 Not yet answered Points out of 4.00 Flag question Question text True or False? The Central Limit Theorem suggests that, if the sample size n is greater than 60, then it must be the case that the population will follow a normal distribution. Select one: True False Question 14 Not yet answered Points out of 4.00 Flag question Question text True or False? A 90% confidence interval for the population mean will be shorter than a 95% confidence interval for the population mean, for a given random sample. Select one: True False Question 15 Not yet answered Points out of 4.00 Flag question Question text True or False? The Student's t distribution approaches the standard normal distribution z as the degrees of freedom go up. Select one: True False Question 16 Not yet answered Points out of 4.00 Flag question Question text In a random sample of 16 ATM transactions at a bank, the sample mean transaction time is 2 minutes with the sample standard deviation of 1.6 minutes. We can use this sample to construct a 95% confidence interval (in minutes) for the population mean transaction as_______, after applying the table below to get the Student's t statistic. Select one: a. (1.2988, 2.7012) b. (1.1520, 2.8480) c. (1.1476, 2.8524) d. (1.4652, 2.5348) Question 17 Not yet answered Points out of 4.00 Flag question Question text True or False? When n = 30 and p (p is the sample proportion) = 0.4, the sample proportion can be safely assumed to follow a normal distribution. Select one: True False Question 18 Not yet answered Points out of 4.00 Flag question Question text If the population standard deviation = 25, what is the required minimum sample size to construct a 90% confidence level for the population mean with an allowable error of 3, using Z0.05=1.645? Select one: a. 426 b. 512 c. 267 d. 188 Question 19 Not yet answered Points out of 4.00 Flag question Question text True or False? A 25yearold man in Boone complains of chest pain. He wants to be admitted by a hospital as a patient because he believes he has a heart attack. Heart attacks in 25 year olds are rare, and medical treatments on heart attacks are expensive in the hospital. The null hypothesis is that the man has no heart attack. For a given test on whether the man has a heart attack, the probability of committing a Type II error is: P(The hospital does not admit him as a heart attack patient | The man has a heart attack). Select one: True False Question 20 Not yet answered Points out of 4.00 Flag question Question text True or False? For a given sample size and a given test on a pair of hypotheses, reducing the probability of committing a Type II error increases the power of the test. Select one: True False Question 21 Not yet answered Points out of 4.00 Flag question Question text True or False? In testing the hypotheses H0: 30, H1: >30 where 30 is the hypothesized mean of a population, we must use a lefttailed test. Select one: True False Question 22 Not yet answered Points out of 4.00 Flag question Question text When testing the hypothesis H0: = 100, H1: 100, with known population variance 2 = 100, we find that the sample mean is 103 in a random sample of 100 items. The test statistic is Select one: a. 1.645 b. 1.960 c. 0.300 d. 3.000 Question 23 Not yet answered Points out of 4.00 Flag question Question text In a righttailed hypothesis test on a population mean (suppose the population standard deviation is known), the test statistic z = 1.68. The pvalue is (Use the partial C2 table below): Select one: a. 0.0465 b. 0.9535 c. 0.1186 d. 0.0179 Question 24 Not yet answered Points out of 4.00 Flag question Question text True or False? In a sample of 16 items, the sample mean is 63 and the sample standard deviation is 10. The critical values of the Student's t statistics (with the degrees of freedom 15) are 1.753 for a two tailed test, at . Then, we should reject H0 (when ): Select one: True False Question 25 Not yet answered Points out of 4.00 Flag question Question text True or False? A company tracks a shopper's record of bringing back items. The historical return rate for merchandise at department stores is 13.0 percent. At one department store, after installing a new software to crack down on \"serial exchangers\