M&M’S Does Mars, Incorporated use the same proportion of red candies in its plain and peanut varieties? A random sample of 56 plain M&M’S contained 12 red candies, and another random sample of 32 peanut M&M’S contained 8 red candies.
a. Construct a 95% confidence interval for the difference in the proportions of red candies for the plain and peanut varieties.
b. Based on the confidence interval in part a, can you conclude that there is a difference in the proportions of red candies for the plain and peanut varieties? Explain.
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