A manager for an insurance company believes that customers have the following preferences for life insurance products: 20% prefer Whole Life, 20% prefer Universal Life, and 60% prefer Life Annuities. The results of a survey of 231 customers were tabulated. Is it possible to refute the sales manager's claimed proportions of customers who prefer each product using the data? HO: Preferences for life insurance products are as per the manager's belief. Ha: Preferences for life insurance products are not as per the manager's belief. An automobile manufacturer has given its van a 50.7 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the actual MPG for this van since it is believed that the van has an incorrect manufacturer's MPG rating. After testing 140 vans, they found a mean MPG of 50.6. Assume the population standard deviation is known to be 2.2. A level of significance of 0.05 will be used. Make the decision to reject or fail to reject the null 50.6 - 50.7 2.2 hypothesis Fail to reject Null Hypothesis #-57