Between 2006 and 2010, the average at rst marriage among US women was 23.44 years, with a standard deviation of4.72 years. In 2014, a survey of 6500 women was conducted to see if this number had changed, The average age at first marriage among those surveyed was 23.54 years. a) Conduct a hypothesis test of Ho: #:2144 versus H3: '1 > 23.44 using 11:005. Provide the Z *statistic and Pcvalue. Give the Z *statistic to two decimal places and the Pavalue to four decimal places. b) which of the following is the best explanation of why such a small and likely impractical difference in age was found to be statistically significant? 0 2014 was too close in time to the period 2006 to 2010. 0 There is too little variety in age at first marriage among US women. 0 The level of signicance used was too high. The test only makes sense uslng a: .01. 0 When sample size is very large, even differences with little or no practical value are often statistically significant