Find the value of the standard score, z, and determine whether to reject the null hypothesis at a 0.050.05 significance level. Is the alternative hypothesis supported? Upper H 0H0: muμequals=18.818.8 meters, Upper H Subscript aHa: muμnot equals≠18.818.8 meters, nequals=8181, x overbarxequals=19.619.6 meters, sigmaσequals=1.31.3 meters Question content area bottom Part 1 The value of the standard score is enter your response here. (Round to two decimal places as needed.)