ts there a ofference in long term vields between conservative and ageressive muthal funds? A randems sample of 57 conservative and 80 aggressive tunds looked at their minerhst annusi frthme rates over the past 10 years. (a) Which type of hypothesis test should be conducted? t-test for paires data two sample t-test one Broportion ztest one sample ptest (b) A 99% confoence interval was found to be (0.1%,9.5%). Can we doin a difference in the averape 10 year feturns? , since O is the interval, there is evidence the average returns are.