Description Find each indicated measure for circle O. a. m?A b. mModifyingAbove CE with arcCE c. m?C d. m?D e. m?ABE A circle with center O has five points on the circle labeled as follows, clockwise from the top: B, D, E, C, A. Line segments are draw between the points such that they form the following line segments: AB, AD, BC, BE, and CD. Angle CBE is labeled 25 degrees. Arc BD is labeled 84 degrees. Arc AC is labeled 82 degrees. a. m?A= (Do not include the degree symbol in your answer.) b. mModifyingAbove CE with arcCE= (Do not include the degree symbol in your answer.) c. m?C= (Do not include the degree symbol in your answer.) d. m?D= (Do not include the degree symbol in your answer.) e. m?ABE= (Do not include the degree symbol in your answer.)
Description Find the value of a. The dot represents the center of the circle. Three points lie on a circle. Line segments are drawn between two pairs of points such that they form an angle that measures 62 degrees. The angle intercepts a piece of the circle that measures "a" degrees. a=
Description The polygon circumscribes a circle. What is the perimeter of the polygon? A four-sided polygon circumscribes a circle. The sides of the polygon are as follows, listed here in clockwise order from the top: side that rises from left to right; side that falls from right to left, side the rises from right to left, vertical side. The top side of the polygon is divided into two parts with the following lengths: to the left of the point of tangency, 7 centimeters; to the right of the point of tangency, 18 centimeters. The bottom side of the polygon is divided into two parts with the following lengths: above and to the left of the point of tangency, 5 centimeters; below and to the right of the point of tangency, 6 centimeters. The perimeter of the polygon is cm.
Description Worthy Cause Scenarios "A nation's greatness is measured by how it treats its weakest members." -- Mahatma Ghandi. In this scenario, you will explore and analyze our society by looking at statistics on our less fortunate members. Your goal is to determine if your cause is most worthy. Complete the task listed under the role. Role #1 Poverty Analyst Analyze poverty in the United States. Do you believe that there is a problem with poverty in the United States? Is it getting worse year by year or better?What does the data suggest? 1) Go to the statistical abstracts entitled Data on page 2, or you may locate your own data by going to: https://www.census.gov/library/publications/2011/compendia/statab/131ed.html and find data tables that support your argument. 2) Make at least two graphics from these data. One should be a scatterplot with a trend line, R square, and equation. The other graph/graphs is/are of your choosing. 3) Note: be careful about saying a trend is increasing. It could be because the population is increasing. Make sure that you divide your values by the population in that year to standardize the values; that way you can report them as a proportion. 4) Include your graph, equation, calculations and results.
Description Learn by Doing The purpose of this activity is to give you guided practice in carrying out the ANOVA F-test using StatCrunch. Some features of this activity may not work well on a cell phone or tablet. We highly recommend that you complete this activity on a computer. Here are the directions and grading rubric for the Learn by Doing discussion board exercises. A list of StatCrunch directions is provided at the bottom of this page. Context Critical flicker frequency (CFF) and eye color Computer screens and fluorescent bulbs flicker. If the frequency of the flicker is below a certain threshold, the eye detects the flicker, and it is annoying! Different people have different flicker "threshold" frequencies (known as the critical flicker frequency, or CFF). The mean critical threshold frequency is important for product manufacturing as well as tests for ocular disease. In 1973, researchers conducted a study to answer the following question. Research question: Do people with different eye color have different threshold flicker sensitivity? The 1973 study ("The Effect of Iris Color on Critical Flicker Frequency," Journal of General Psychology [1973], 91–95) obtained the following data from a random sample of 19 subjects. Color Threshold Frequency (CFF) Blue Brown Green Brown 26.8 25.7 26.8 26.4 Brown 27.9 27.2 27.9 24.2 Brown 23.7 29.9 23.7 28 Brown 25.0 28.5 25 26.9 Brown 26.3 29.4 26.3 29.1 Brown 24.8 28.3 24.8 Brown 25.7 25.7 Brown 24.5 24.5 Green 26.4 Green 24.2 Green 28.0 Green 26.9 Green 29.1 Blue 25.7 Blue 27.2 Blue 29.9 Blue 28.5 Blue 29.4 Blue 28.3 In this spreadsheet the data is presented in two formats. Stacked data: The quantitative data is stacked in one column. The first two columns show the data in a stacked format. Each variable is a column (one column for the explanatory variable eye color; one column for the response variable CFF) and each row is an individual. For example, the first row is a brown-eyed person with a CFF of 26.8. Unstacked data: The quantitative data is distributed across the groups in multiple columns. The last three columns show the same data in an unstacked format. In this format, each column is a group defined by a value of the explanatory variable: one column for blue-eyed people, one column for brown-eyed people and one column for green-eyed people. Each column contains the response values (CFF) for that group. The format of the data in the spreadsheet affects how we use StatCrunch to analyze it. Variables Color: This is the explanatory variable. The categorical data represents the groups we will compare. CFF (flicker threshold sensitivity): This is the response variable. The quantitative data represents the frequency threshold at which the subject sees the flicker. Data Download the flicker (Links to an external site.) datafile. As always, ignore or close any prompt that invites you to login while downloading the file. Upload the datafile to StatCrunch. Prompt We will conduct an ANOVA F-test for the variables Color and CFF. The flicker datafile is available in the Data section below. Also, the StatCrunch directions are provided in the list a the bottom of this page. What are the hypotheses for the ANOVA test? Be sure that you define clearly the parameters. Are the conditions that allow us to safely use the ANOVA F-test met? Explain. Note: To verify conditions, you will need to examine the distribution of CFF scores for each sample (because the samples are small). Use StatCrunch to create side-by-side dotplots, histograms or boxplots (your choice) to examine the distribution of CFF scores for each sample. You can use either data format; choose one (stacked data in the first two columns; or unstacked data in the the last three columns). To create the side-by-side graphs (for either data format) see the list of StatCrunch directions below. Download the StatCrunch output window (your graph), upload it to your Stats-Class folder, and then embed the .png file (your graph) in your initial post. To recall how to complete these tasks, see the list of StatCrunch directions below. You will also need to compare the sample standard deviations. Use StatCrunch to find the summary statistics, means and standard deviations for the comparison groups (select the the appropriate Descriptive Statistics StatCrunch directions from the list below). Then copy and paste the table into your initial post and explain how the rule of thumb for comparing standard deviations is met. Use StatCrunch to carry out the ANOVA F-test (select the appropriate ANOVA StatCrunch directions from the following two options). Anova F-test Stacked Data Format OR Anova F-test Unstacked Data Format Copy and paste the output table into your initial post. State your conclusion in context of eye color and mean CFF. List of StatCrunch Directions Each link will open in a new window. To return to this discussion, either close the new tab or select the tab for this discussion. Create Your Stats-Class Folder in Canvas (You only need to do this once.) Purchase StatCrunch (You only need to do this once.) Open StatCrunch Download Excel Data File Upload Excel Data File to StatCrunch Download StatCrunch Output Window (no screenshots; please use these directions) Upload Files into Your Stat-Class Folder in Canvas Embed Pictures in a Discussion Post (no attachments; please use these directions) Side-by-side Boxplots Stacked Data Format Side-by-side Boxplots Unstacked Data Format Side-by-side Dotplots Stacked Data Format Side-by-side Dotplots Unstacked Data Format Side-by-side Histograms Stacked Data Format Side-by-side Histograms Unstacked Data Format Descriptive Statistics Multiple Categories Stacked Data Format Descriptive Statistics Multiple Categories Unstacked Data Format Copy & Paste a StatCrunch Table Anova F-test Stacked Data Format Anova F-test Unstacked Data Format
