Gregor Mendel's Experiments & Discovery

When Mendel conducted his famous genetics experiments with peas, one sampling of offspring consisted of 428 green peas and 152 yellow peas. Use a 0.1 significance level to test Mendel's claim that 25% of the peas would be yellow (use Excel to calculate the p-value). Be sure to state your Ho, p-value, and official conclusion in full sentence form. Caution: This is a two-tailed test.