Find the value of the standard score, z, and determine whether to reject the null hypothesis at a 0.05 significance level. Is the alternative hypothesis supported? Ho: null= 7.50 grams Ha: = null< 7.50 grams n= 100 X bar= 3.50 grams Significance level: 3.00 grams 1. Find the value of the standard score 2. Find the critical value(s) 3. Determine weather the alternative hypothesis is supported at a 0.05 significance level