Let x be a random variable representing dividend yield of bank...

Let x be a random variable representing dividend yield of bank stocks. We may assume that x has a normal distribution with 𝜎 = 2.5%. A random sample of 10 bank stocks gave the following yields (in percents).5.7 4.8 6.0 4.9 4.0 3.4 6.5 7.1 5.3 6.1The sample mean is = 5.38%. Suppose that for the entire stock market, the mean dividend yield is 𝜇 = 4.4%. Do these data indicate that the dividend yield of all bank stocks is higher than 4.4%? Use 𝛼 = 0.01.

Math Statistics and Probability

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