Heather Carielli is a former student earned a Master’s degree in statistics at the University of Massachusetts. When she randomly selected 26 new textbooks in the college bookstore, she found that they had prices with a mean of $50.541 and a standard deviation of $16.50., if the previous studies claim in the college catalog that the mean price of a textbook at this college is equal to $55? State wither you reject or failed to reject the null hypothesis at 0.05 level of significance (show all your calculation)