E Reflection: Bootstrapping Using Statkey Work this together, but with each person having an open copy of this document and Statkey. You should share your screens back and forth. Every term, some of the authors of our book give students a survey on the first day of class. One of the questions that they ask them is to estimate how many hours of TV they watch per week. The column below gives the answers from a sample. Copy the data onto your computer's clipboard. (Right click over them to select, then CTRL-C) (Command-C in Apple.) (It goes down a bunch of pages.) TV 17 5 1 3 4 0 86 6 5 8 1 5 2 15 3 1 2 5 2 20 10 3 5 8 2 6 4 8 2 20 10 25 5 5 5 5 5 4 5 8 2 14 20 20 10 3 1 14 0 20 2 6 15 3 21 7 7 3 12 6 3 20 8 0 12 6 4 46 5 3 3 8 8 20 5 4 4 3 2 4 5 2 3 8 6 4 5 5 5 8 2 10 4 5 20 14 2 4 8 7 5 31 5 20 8 3 6 1 1 10 3 7 3 10 3 3 25 2 15 6 13 3 2 5 1 4 5 10 4 3 2 4 3 3 3 2 20 3 4 3 4 13 5 5 4 3 10 10 7 10 3 5 2 5 4 5 10 2 10 15 20 21 10 10 4 10 3 27 10 6 2 4 27 2 15 10 3 10 10 10 5 4 14 6 5 2 14 5 3 6 10 5 10 2 5 2 10 3 40 10 Descriptive Statistics 1 Determine a reasonable population from which you could say this sample is drawn. [3 pts] 2. In Statkey, under Descriptive Statistics /One Quantitative Variable, select Edit Data and paste the contents of your clipboard. Since there are no identifying data, de-select "First Column Is Identifier." a) This sample is a snapshot of the population you identified in number one. Make a histogram and paste it in the space below. [4 pts] b) What does the shape of the histogram tell you about TV watching habits among students? (Write a sentence...) [4 pts] C) How many standard deviations above the mean is a student who watches TV for 20 hours a week? Show your calculations. [3 pts] Confidence interval 3. Using the same data, paste it in to StatKey / Bootstrap Cl's / Single Mean. Run 1 bootstrap sample, 4 times. Find the mean of your 4 means. [2 pts] BS Mean 1 BS Mean 2 BS Mean 3 BS Mean 4 Mean of Means Run (at least) 1000 bootstrap means. Estimate SE(x-bar). [3 pts] 4 5. Find a 95% confidence interval for mu, the mean number of hours watched per week by the population of all students. Show your thought process. [4 pts] 6. Interpret your results in a sentence. [4 pts] E Reflection: Bootstrapping Using Statkey Work this together, but with each person having an open copy of this document and Statkey. You should share your screens back and forth. Every term, some of the authors of our book give students a survey on the first day of class. One of the questions that they ask them is to estimate how many hours of TV they watch per week. The column below gives the answers from a sample. Copy the data onto your computer's clipboard. (Right click over them to select, then CTRL-C) (Command-C in Apple.) (It goes down a bunch of pages.) TV 17 5 1 3 4 0 86 6 5 8 1 5 2 15 3 1 2 5 2 20 10 3 5 8 2 6 4 8 2 20 10 25 5 5 5 5 5 4 5 8 2 14 20 20 10 3 1 14 0 20 2 6 15 3 21 7 7 3 12 6 3 20 8 0 12 6 4 46 5 3 3 8 8 20 5 4 4 3 2 4 5 2 3 8 6 4 5 5 5 8 2 10 4 5 20 14 2 4 8 7 5 31 5 20 8 3 6 1 1 10 3 7 3 10 3 3 25 2 15 6 13 3 2 5 1 4 5 10 4 3 2 4 3 3 3 2 20 3 4 3 4 13 5 5 4 3 10 10 7 10 3 5 2 5 4 5 10 2 10 15 20 21 10 10 4 10 3 27 10 6 2 4 27 2 15 10 3 10 10 10 5 4 14 6 5 2 14 5 3 6 10 5 10 2 5 2 10 3 40 10 Descriptive Statistics 1 Determine a reasonable population from which you could say this sample is drawn. [3 pts] 2. In Statkey, under Descriptive Statistics /One Quantitative Variable, select Edit Data and paste the contents of your clipboard. Since there are no identifying data, de-select "First Column Is Identifier." a) This sample is a snapshot of the population you identified in number one. Make a histogram and paste it in the space below. [4 pts] b) What does the shape of the histogram tell you about TV watching habits among students? (Write a sentence...) [4 pts] C) How many standard deviations above the mean is a student who watches TV for 20 hours a week? Show your calculations. [3 pts] Confidence interval 3. Using the same data, paste it in to StatKey / Bootstrap Cl's / Single Mean. Run 1 bootstrap sample, 4 times. Find the mean of your 4 means. [2 pts] BS Mean 1 BS Mean 2 BS Mean 3 BS Mean 4 Mean of Means Run (at least) 1000 bootstrap means. Estimate SE(x-bar). [3 pts] 4 5. Find a 95% confidence interval for mu, the mean number of hours watched per week by the population of all students. Show your thought process. [4 pts] 6. Interpret your results in a sentence. [4 pts]