Suppose that you take samples of two types of soil and you want to compare the microbe counts of them. The sample from the first type of soil has a size of $20,$ a mean

of $600$ CFUs, and a standard deviation of $60$ CFUs; the sample from the second type has a size of $17,$ a mean of $800$ CFUs, and a standard deviation of $40$ CFUa. You are

testing whether there is a difference in the average microbe count between the two types of soil. What is the absolute value of your t test statistic? Round your answer to $2$

decimal places.