A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 2% of the true proportion. No preliminary estimate is available. Find the minimum sample size needed. What is the minimum sample size needed assuming that no prior information is available? n= (Round up to the nearest whole number as needed.)

You intend to conduct a test of homogeneity for a contingency table with 8 categories in the column variable and 6 categories in the row variable. You collect data from 373 subjects. What are the degrees of freedom for the x distribution for this test? d.f. = Submit Question Ghp

You are working on the design for a study on the proportion of adults who work remotely in the U.S. The original design sought to limit the margin of error to 0.1 and the new design seeks to limit the margin of error to 0.01. What must be the corresponding change to the minimum sample size? A. It must increase B. Nothing, because the minimum sample size doesn't depend on margin of error C. It must decrease

Another idea is to look at how a team's payroll impacts its home attendance. Higher payroll usually signals more higher-skilled players on a roster which should brings fans to the ballpark to see these players. Create 2 samples based on Team Salary and calculate average attendance, variance of attendance, and standard deviation of attendance for each sample. Sample 1 = 10 teams with the highest team salary Sample 2 = 10 teams with the lowest team salary   Tip: Use Excel's sorting tool to sort the data by salary (highest to lowest), and copy the 10 highest and 10 lowest into a separate part of the spreadsheet for easier analysis.     Sample 1 Sample 2   Top 10 Team Salary Bottom 10 Team Salary Sample mean attendance  mil  mil Sample attendance  variance  mil  mil Sample attendance standard deviation  mil  mil   Perform a hypothesis test to determine whether there is a difference in the mean attendance of teams between the two groups…