STATISTICS FINAL REVIEW WEEK QUESTIONS AND ANSWERS

STATISTICS FINAL REVIEW WEEK QUESTIONS AND ANSWERS Week 1 Introduction to Statistics, Data Collection, and Data Concepts Homework Problems #1 Steps to solve: 1. Number of children for each household in a town is not a subset, so it would be a population because it is a collection of al l children in all the town #2 Steps to solve: 1. This is a subset, so it is a sample because it is a collection of 500 (not all) spectator's surveys #3 Steps to solve: 1. It is a subset of all high school students so it is a statistic #4 Steps to solve: 1. In a study of all 4509 professors at a college, it is found that 55% own a vehicle. This is a parameter because it is all, no t a subset of the population #5 Steps to solve: 1. Statistic because it says in the problem, "a sample" #6 Steps to solve: 1. Nominal level data does not have any numeric values, so it can't have more calculations with it 2. No calculations can be done at the nominal level #7 Steps to solve: 1. Data at the ratio level can be put in order #8 Steps to solve: 1. This data is nonnumerical, so it is qualitative 2. It is ordinal because it does have an order. It would be nominal if they were just listed with no numbers. #9 Steps to solve: 1. In an experiment, you have a control group #10 Steps to solve: 1. The experimental unit is females, the tx is the new allergy drug. A is the only one that makes sense 2. Process of elimination, there may be bias if the researcher knows which patients are given the real drug. The experiment is n ot implying men and women, so C is not the correct answer. #11 Steps to solve: 1. Simple random sampling because researchers used random digit dialing 2. Many sources of bias due to type of sampling. Check all that are correct. #12 Steps to solve: 1. Convenience because students from specified location are being chosen 2. Select all bias that make sense #13 Steps to solve: 1. This is sampling because you are sampling because it would be too expensive to take a census which would be all, not some #14 Steps to solve: 1. Look at the numerical values, it could not be GPA, Ages, or Temp #15 #16 Steps to solve: 1. If you cut it down the middle, it is a mirror image, therefor it must be symmetric #17 Steps to solve: 1. Copy data to clipboard 2. Data basic statistics in the Tool Kit 3. Paste data in B column, [Ctrl] + [V] to paste 4. Mean, median, and mode are all given 5. Remember to round to given decimal place! #18 Steps to solve: 1. Copy data to "clipboard" 2. Paste data in the Data Basic Statistics tab 3. Range is given on right hand side of spreadsheet #19 Steps to solve: 1. Copy data to clipboard, paste in Data Basic Statistics B column 2. Range, median, variance, std are all given on right hand side of spreadsheet 3. Use sample std and sample variance because problem states this data is from sample #20 Steps to solve: 1. 2. #20 Steps to solve: 1. For first std, Mean value = 1400, std = 300, the values for first std = mean - std Mean + std 2. So this is the range they are asking for, therefor it is 68%, the sample is 76. To solve, do 76 * .68 = 51.68 Round to nearest whole number