St 101 Question Paper
ST 101
Practice Problems Exam 1
Material covered: Chapters 1-7 in text.
Reiland
Important Note: While most of the questions on this sample exam are in a multiple choice format, the questions on the exam will for the most part be partial credit type questions where you must show some work to obtain full credit. 1. The heights of American men aged 18 to 24 can be described by a Normal model with mean 68 inches and standard deviation 2.5 inches. Half of all young men are shorter than a) 65.5 inches b) 68 inches c) 70.5 inches d) can't tell because the median height is not given Use the information in Problem 1 and the 68-95-99.7 rule to determine the percentage of young men that are taller than 6' 1". The grade point averages (GPA) of …show more content…
Which of the following observations would you suspect is an outlier? a) 150 b) 100 c) 90 d) 125 e) none of the above Which of the following best describes a risk in using the range to measure spread of a data set? Choose one of the following: a) The range is not in the same unit of measurement as the observations themselves. b) The largest or smallest observation may be a mistake or an outlier. c) The range is complicated to compute, which may result in an error. d) The range might be negative so it doesn't make sense to use the range as a measure of …show more content…
Suppose that a Normal model describes the acidity (pH) of rainwater, and the water tested after last week's storm had a z-score of 1.8. This means that the acidity of that rain a. had a pH of 1.8 b. varied with a standard deviation of 1.8 c. had a pH 1.8 higher than the average rainfall d. had a pH 1.8 times that of average rainwater e. had a pH 1.8 standard deviations higher than that of average rainwater 16. The highway gas mileage B, measured in miles per gallon (mpg), of 26 models of midsize cars, have the following summary statistics: B œ 26.54 mpg, median œ 26 mpg, = œ 3.04 mpg, IQR œ 3 mpg. If you convert gas mileage B from miles per gallon to B8/A which is measured in miles per liter, what are the new values of the summary statistics? (3.785 liters œ 1 gallon). 17. Shown below is the normal probability plot for 200 monthly telephone
Practice Problems Exam 1
Material covered: Chapters 1-7 in text.
Reiland
Important Note: While most of the questions on this sample exam are in a multiple choice format, the questions on the exam will for the most part be partial credit type questions where you must show some work to obtain full credit. 1. The heights of American men aged 18 to 24 can be described by a Normal model with mean 68 inches and standard deviation 2.5 inches. Half of all young men are shorter than a) 65.5 inches b) 68 inches c) 70.5 inches d) can't tell because the median height is not given Use the information in Problem 1 and the 68-95-99.7 rule to determine the percentage of young men that are taller than 6' 1". The grade point averages (GPA) of …show more content…
Which of the following observations would you suspect is an outlier? a) 150 b) 100 c) 90 d) 125 e) none of the above Which of the following best describes a risk in using the range to measure spread of a data set? Choose one of the following: a) The range is not in the same unit of measurement as the observations themselves. b) The largest or smallest observation may be a mistake or an outlier. c) The range is complicated to compute, which may result in an error. d) The range might be negative so it doesn't make sense to use the range as a measure of …show more content…
Suppose that a Normal model describes the acidity (pH) of rainwater, and the water tested after last week's storm had a z-score of 1.8. This means that the acidity of that rain a. had a pH of 1.8 b. varied with a standard deviation of 1.8 c. had a pH 1.8 higher than the average rainfall d. had a pH 1.8 times that of average rainwater e. had a pH 1.8 standard deviations higher than that of average rainwater 16. The highway gas mileage B, measured in miles per gallon (mpg), of 26 models of midsize cars, have the following summary statistics: B œ 26.54 mpg, median œ 26 mpg, = œ 3.04 mpg, IQR œ 3 mpg. If you convert gas mileage B from miles per gallon to B8/A which is measured in miles per liter, what are the new values of the summary statistics? (3.785 liters œ 1 gallon). 17. Shown below is the normal probability plot for 200 monthly telephone