A sample of 65 observations is selected from one population with a population standard deviation of .75. The sample mean is 2.67. A sample of 50 observations is selected from a second population with a population standard deviation of .66. The sample mean is 2.64. What is the value of the test statistic (the Z-value)? (This is a modification of Exercise 2 on page 370) In your answer, you may have to allow for rounding by choosing the closest answer.