Fill in the blanks. the owner of get-a-away travel has recently surveyed a random sample of 208 customers to determine whether the mean age of the agency's customers is over 26. the appropriate hypotheses are upper h 0: muequals26, upper h subscript a baseline : mu greater than 26. if he concludes the mean age is over 26 when it is not, he makes a error. if he concludes the mean age is not over 26 when it is, he makes a error.