Question 7 (1 point) Consider the data summarised in the table below: Group 1 Group 2 n 24 55 y 18.19 10.86 S 4.79 4.19 Find the test statistic (t-statistic) for the test HA: 1 - 2 > 0. Note: 1- Round your intermediate numbers to 4 decimal places. 2- Round you final answer to 3 decimal places. Enter your final answer to 3 decimal places. Your Answer: Answer Question 8 (1 point) A student wants to know if the houses in two different neighborhoods have roughly the same price (in millions of dollars) or not. In other words, she wants to test the following hypotheses: [Ho 1 - 2 = 0 HA : - 2 7 0 20 She takes a random sample of houses from each neighborhood and finds that the summary statistics for the two neighborhoods look as follows. Neighborhood 1 Neighborhood 2 n1 =28 1 =$1.4 n2 =27 2 =$0.8 S =$0.47 S2 =$0.37 Find the t-statistic (test statistic) used to test the hypothesis. Note: 1- Do not round any intermediate numbers. 3- You do not need to change the unit of measure. You can work with the data in ($1,000,000s). 2- Only round your final answer to 3 decimal places. Enter your final answer with 3 decimal places. Your Answer: Answer Question 9 (1 point) The cost of a university education has increased at a much faster rate than other living expenses in general over the past twenty years. In order to compensate for this, many students work part- or full-time in addition to attending classes. At one university, it is believed that the average number of hours students work per week exceeds 20. Suppose a hypothesis test is done to test their belief. A random sample of 20 students was selected, and it was found that the sample mean is 20.4 and the standard deviation is 11.891. Then the correct value of the test statistic is 2.093 1.729 3.04 0.1504