Suppose that the human resources department at a large company desires to know if occupational stress varies with age. They classify employees into four age classes: A: below age 30, B: age 30-39, C: age 40-55, D over age 55 These four groups are the levels of factor age there are four levels here. With … Read more
1) Under what conditions would a researcher choose to use a t-test for independent samples? 2) Under what conditions would a researcher choose to use a t-test for dependent samples? 3) What are the differences between the two types of t-tests? no references or spacing required. 5-6 sentences
This assignment has two parts! Before you do this part, please take the following steps: First, read the This document contains important information about parts I and II for this assignment. Here is the Paper to Read and Write About:
This week, we are looking at hypothesis tests using qualitative variables. All previous hypothesis tests have involved quantitative variables. Specifically, we are going to perform a Chi-Square Goodness of Fit unequal frequencies test. This test is used to compare an expected result to an observed one. This might involve comparing a survey taken 10 … Read more
If you locate a research article that has any of the methods we will learn about (t test, ANOVA, paired t test, correlation/regression, or chi squared) and submit it, you can receive 10 extra credit points per article. I need about 5-10 articles .
Go to a local library; collect a sample of books consisting of the ages of book (based on copyright dates). Plan and describe the sampling procedure, then use the results to construct a confidence interval estimate of the mean age of all books in the library. Please, post and share your results with the … Read more
Please read all information clearly. Measure of Association Assignment: (Show your calculation) 1) A study looking at breast cancer in women compared cases with non- cases, and found that 75/100 cases did not use calcium supplements compared with 25/100 of the non-cases. (20 points) 1) Develop a 2×2 table to display the data. 2) Calculate … Read more
Week 4 Project – STAT 3001 Student Name: <Type your name here> Date: <Enter the date on which you began working on this assignment.> Instructions: To complete this project, you will need the following materials: Statdisk Users Manual (link found on week 4 Project resources page) Access to the Internet to download the Statdisk … Read more
Question 1 A national survey was initiated and intended to capture the prevalence of HIV in the post-HAART (Highly active anti-retroviral therapy) era of treatment. Out of a sample of 1,483 participants, a total of 241 were found to be HIV positive. A) Calculate a SE. B) Construct a 95% confidence interval about the estimate. Question 2 … Read more
Simulation Challenge 2 comes in two flavors: Sign Test (maximum of 50 points) or Wilcoxon Signed Rank test (maximum of 60 points). You can do one or the other (NOT both). If you submit both, I will grade the WSR paper only. Sign Test: Generate a data set that satisfies the assumptions of the sign … Read more