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. | |Enter the ALTERNATIVE HYPOTHESIS, H1 number. 1) H1: mean (greater than)> 21 min. 2) H1: mean (less than) < 21 min. 3) H1: mean (less than) < 18 min. 4) H1: mean Not Equal To 21 min. 5) H1: mean (less than) < 0 6) No answer is correct