Author Question: A scatter diagram can show whether a pair of variables has a strong or weak relationship, and also ... (Read 187 times)

nenivikky · **on:** Jun 24, 2018

A scatter diagram can show whether a pair of variables has a strong or weak relationship, and also whether it is linear or curved.

Indicate whether the statement is true or false

Question 2

A public policy research group is conducting a study of health care plans and would like to estimate the average dollars contributed annually to health savings accounts by participating employees.

A pilot study conducted a few months earlier indicated that the standard deviation of annual contributions to such plans was 1,225. The research group wants the study's findings to be within 100 of the true mean with a confidence level of 90. What sample size is required?A) 407
B) 361
C) 512
D) 546