Answer Happy

We have two random samples of 100 observations and we wish to perform a 2-sample t-test to test the null hypothesis H : 141 = 42, where fı is the true mean of group 1 and 42 is the true mean of group 2. We know the following information: . The sample mean of group 1 is -0.2 and the standard deviation is 0.89. • The sample mean of group 2 is 2.03 and the standard deviation is 3.07. We also have the following two QQ-plots: Group 1 Group 2 2 10 sample 0 -1 N -2 -1 0 1 2 2 -1 0 1 2 theoretical plot of chunk QQplots Select all of the following which are true. The test statistic is -6.98 The degrees of freedom from our rule of thumb is 99 To two decimal places, the standard error is 0.1 The test statistic is 5.73 O The p-value is 3.406e-10 Normality is reasonable