1 Which of the following is not a characteristic of a binomial experiment? Each trial has only two possible outcomes - a success or a failure. The probability of a success must exceed the probability of a failure. Each trial is independent of the other trials in the experiment. The experiment consists of a fixed number of trials. Question 2 The state in which the respondents in a survey reside is an example of Ratio data Nominal data Ordinal data Interval data Question 3 The mathematical science that deals with the collection, analysis, and presentation of data is Data analysis Mathematical analysis Statistics Economics Question 4 The number of rushing touchdowns for the Minnesota Vikings in a season is an example of Nominal data Ratio data Ordinal data Interval data Question 5 So far this year, stock A has had a mean price of $8.00 per share with a standard deviation of $3.00, while stock B has had a mean price of $12.50 per share with a standard deviation of $4.25. Which stock is more volatile (less consistent)? Stock B None of the above They are the same Stock A Question 6 Which distribution best describes the number of twin births in a sample of 20 babies, if twins comprise 2% of all births on average? Poisson Normal Binomial Uniform Question 7 ________ data are considered the lowest level of data, and, as a result, the statistical techniques used to analyze them are the most restrictive. Nominal Ratio Interval Ordinal Question 8 Which is a time series variable? Dollar exchange rates yesterday against 10 other world currencies VISA balances of 30 students on December 31 of this year Titles of the top 10 movies in total revenue last week Net earnings reported by Xena Corp for the last 10 quarters Question 9 Which is not a discrete random variable? The number of applicants applying for a civil service job The number of births in a hospital on a given dat The hourly earnings of a call center employee in Boston The number of fives obtained in four rolls of a die Question 10 If a data set is symmetric then The mean is greater than the median. The mean is equal to the median. None of the above. The mean is less than the median. Question 11 Given the following information, determine which investment is more volatile (i.e., less consistent). All common stock has a mean return of $19.20 and a standard deviation of $16.80. Real estate has a mean return of $15.60 and a standard deviation of $14.00. All common stock They are the same None of the above Real estate Question 12 Which distribution would be most appropriate to describe the number of fatalities in Wisconsin per year due to poisonous snakebites? Binomial Normal Poisson None of the above Question 13 True or false: A distribution that has a great many values clustered to the right and then trails off to the left is said to be left-skewed. True False Question 14 1 pts True or false: According to the empirical rule, approximately 99% of the data is within two plus or minus standard deviations of the mean. True False Question 15 True or false: A z-score measures the number of standard deviations a value is from its mode. True False Question 16 True or false: A smaller coefficient of variation indicates less consistency within a set of data values. True False Question 17 True or false: According to the empirical rule, 95% of the data is within three plus or minus standard deviations of the mean. True False Question 18 True or false: The Poisson distribution describes the number of occurrences within a randomlychosen unit of time or space. True False Question 19 Find the sample standard deviation for the following sample of quiz grades: 100 87 71 64. Question 20 Consider the following data on the number of beers consumed by 10 football fans during a recent game: 4 0 2 2 6 1 3 8 5 2 Using this data, calculate the mean number of beers consumed. Question 21 Consider the following data on the number of beers consumed by 10 football fans during a recent game: 4 0 2 2 6 1 3 8 5 2 Using this data, calculate the median number of beers consumed. Question 22 Consider the following data on the number of beers consumed by 10 football fans during a recent game: 4 0 2 2 6 1 3 8 5 2 Using this data, calculate the mode number of beers consumed. Question 23 Consider the following data on the number of beers consumed by 10 football fans during a recent game: 4 0 2 2 6 1 3 8 5 2 Which is true about this data? None of the above. They are left-skewed. They are right-skewed. They are symmetric. Question 24 Assume the average exam score is 80 points, the standard deviation is 5 points, and the distribution of grades is bell-shaped around the mean. Use the empirical rule to determine the range of scores that will include approximately 99% of students around the mean. Lower bound: . Upper bound: . Question 25 According to the Wall Street Journal, 20% of album sales in 2009 were digital. Consider a random selection of 6 album sales. What is the probability that exactly 2 sales were digital? Write you answer as a probability (i.e., a number between 0 and 1). Question 26 According to the Wall Street Journal, 20% of album sales in 2009 were digital. Consider a random selection of 6 album sales. What is the probability that at least 4 sales were digital? Write you answer as a probability (i.e., a number between 0 and 1). Question 27 A particular intersection in Delaware is equipped with a surveillance camera. The number of traffic tickets issued to drivers passing through the intersection follows the Poisson distribution and averages 4.5 per month. What is the probability that 5 or more traffic tickets will be issued at the intersection next month? Question 28 Consider the following discrete probability distribution. x 2 3 4 5 6 Total P(x) 0.34 0.12 0.32 0.08 0.14 1.00 What is the mean of this discrete probability distribution? Question 29 Consider the following discrete probability distribution. x 2 3 4 5 6 Total P(x) 0.34 0.12 0.32 0.08 0.14 1.00 What is the variance of this discrete probability distribution? Question 30 Mal and Jayne agree on 10 percent of their transport jobs. What is the probability that they agree on 3 our of the next 8 jobs? Question 31 Kaylee is a mechanic. She can encounter any number of engine-room problems in a day. On average, there are 3.4 engine-room problems daily. Let X be the number of engine-room problems in a given day. What is the probability of more than 6 engine-room problems