The historical average time spent on a website was 21 min. with a standard deviation of 7 min. The website time spent can be assumed normally distributed. In a recent month the average time spent for 10 people was 18 min. Test whether there has been a decrease in the time spent. Use the 5% level of significance. | What is the value of the TEST STATISTIC? ______________________________ Note: Enter XXX.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 134.784 is entered as 134.78, 35.295 is entered as 35.30, .2749 is entered as 0.27, -.5650 is entered as -0.57