What method of sampling would you suggest the company use in the future to obtain a good representative sample? Based on the sample data provided, what is the probability that a randomly selected individual using the TM195, TM498, and TM798 model has an annual expendable income greater than $50,000? How would you interpret the results obtained? Management at CardioGood Fitness believe that there is a sweet spot between one's annual expendable income and the type of treadmill purchased. Based on the sample data provided, you are asked to determine what expendable income represents 75% of the individuals that purchased the TM195, TM498, and TM798 treadmill models. How would you interpret the results obtained? Using the data provided, is it true that at least 80% of the TM798 treadmill users run/walk more than 100 miles a week? Provide details to support your response. How does your answer in questions 2, 3, and 4 differ from the responses you provided in Module 3 for the same set of questions? Provide an explanation for why these responses are different. What sample size would you recommend the Management at CardioGood Fitness collect in the future if you want to estimate the mean weekly miles run/walked (per week) for users of the TM195 model? Based on past studies, the population standard deviation is assumed to be 25 miles/week. Other company parameters given to you are as follows: 95% confidence level in the results is expected and the permissible margin of error is 3 mil