Which one of the following is an approach to handling confounding? (choose one best answer) O Stratification O Selection of neighborhood controls O Matching cases and controls by exposure status O Blinding to exposure or disease status

How Democratic is Georgia? Percentage of Democratic vote by counties in Georgia is shown for a recent election. For your convenience the data have been sorted in increasing order (Source: County and City Data Book, 12th Edition, U.S. Census Bureau). Make a frequency table with class limits, midpoints and frequency using five classes. Estimate the mean using the frequency table (i.e. using the grouped data, not the original data). Show your work using a table. Estimate the variance and standard deviation (definitional formula) using the frequency table (i.e. using grouped data, not the original data). Show your work using a table.

The relative frequency of a class if 8 of the 40 data values lie within it is which of the following?   The relative frequency of a class if 8 of the 40 data values lie within it is which of the following?   0.10 0.20 0.25 0.40

We have provided simple data sets for you to practice finding the descriptive measures discussed in this section. For each data set, a. obtain the quartiles. b. determine the interquartile range. c. find the five-number summary. 1, 2, 3, 4

I need help with something regarding this problem.  The National Sleep Foundation recommends that adults aged 18 to 64 get an average of 8 hours of sleep per night. A survey of sleep hours was taken during a Statistics class. The data is listed below:   4, 5, 5, 5, 5.5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 10, 10   Do we have enough evidence at the 0.05 significance level to say that statistics students tend to get less sleep than the recommended average of 8 hours per night?   How would I get the degrees of freedom?

Week 11 Discussion Board – Ethics in Statistics As you start working on your SEA course project, it is important that you also start to think about the idea of ethics in statistics. The Belmont Report (1976) summarizes ethical principles and guidelines for the research: Respect for Persons, Beneficence, and Justice. After watching the ethics video in this week’s module, respond to the discussion board. Initial Post Week 11 Discussion Board – Ethics in Statistics As you start working on your SEA course project, it is important that you also start to think about the idea of ethics in statistics. The Belmont Report (1976) summarizes ethical principles and guidelines for the research: Respect for Persons, Beneficence, and Justice. After watching the ethics video in this week’s module, respond to the discussion board. Initial Post For your post, consider one of the ethical principles from the Belmont report. How did the video discuss this principle?…

Please apply table to question. Thanks!

Normal No Spacing Heading 1 A Paragraph Styles Font 2. Consider the boxplots below and answer the questions that follow. Boxplots of Data Sets A and B A 10 15 20 25 30 35 40 Values a. Which data set has the larger range? b. Circle all outliers. c. What is the value of the median for data set B (approximately)? d. What is the value of the first quartile for data set A (approximately)? e. Which data set has the larger interquartile range (IQR)? f. About 75% of data set B lies below what value? Preditions: On Accessibility: Investigate O Focus 10 fg ho prt sc 1 & * 8. 00

Only answer part C, use Part B and the chart if needed.

Use the given minimum and maximum data​ entries, and the number of​ classes, to find the class​ width, the lower class​ limits, and the upper class limits.   minimum=16​, maximum=121​, 8 classes       Question content area bottom Part 1 The class width is enter your response here   . ​(Type a whole​ number.) Part 2 Choose the correct lower class limits below.     A. 16​, 29​, 44​, 57​, 71​, 86​, 99​, 114   B. 30​, 43​, 58​, 72​, 86​, 99​, 113​, 127   C. 16​, 30​, 44​, 58​, 72​, 86​, 100​, 114   D. 29​, 43​, 58​, 71​, 85​, 99​, 114​, 127 Part 3 Choose the correct upper class limits below.     A. 30​, 44​, 58​, 72​, 86​, 99​, 114​, 127   B. 29​, 43​, 57​, 71​, 85​, 99​, 113​, 127   C. 29​, 43​, 58​, 72​, 85​, 99​, 113​, 127   D. 30​, 44​, 57​, 71​, 86​, 99​, 114​, 127