Refer to Data Set 18 in Appendix B and find the sample proportion of M&Ms that are red. Use that result to test the claim of Mars, Inc., that 20% of its plain M&M candies are red.

Data Set 18: M&M Plain Candy Weights (grams) STATDISK: Minitab: Excel: Data set name is M&M. Worksheet name is M&M.MTW. Workbook name is M&M.XLS. App name is MM, and the file names are the same as for text files. TI-83/84 Plus: Text file names: Text file names are RED, ORNG, YLLW, BROWN, BLUE, GREEN. Orange Yellow 0.735 0.883 0.895 0.769 0.859 0.784 Red 0.751 0.841 0.856 0.865 0.799 0.864 0.966 0.852 0.859 0.866 0.857 0.859 0.942 0.838 0.873 0.863 0.888 0.809 0.890 0.925 0.878 0.793 0.905 0.977 0.850 0.830 0.856 0.842 0.778 0.786 0.853 0.864 0.873 0.880 0.882 0.931 0.824 0.858 0.848 0.851 Brown 0.696 0.876 0.855 0.806 0.840 0.868 0.859 0.982 Blue 0.881 0.863 0.775 0.854 Green 0.925 0.914 0.881 0.865 0.810 0.865 0.858 1.015 0.818 0.868 0.803 0.932 0.842 0.832 0.807 0.841 0.932 0.833 0.881 0.818 0.855 0.942 0.825 0.869 0.912 0.876 0.809 0.865 0.848 0.940 0.833 0.845 0.852 0.778 0.814 0.864 0.881 0.825 0.887 0.886 0.791 0.810