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Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution with \alpha =2.3% A random sample of 18 Australian bank stocks has a sample mean of x bar = 6.1%. For the entire Australian stock market, the mean dividend yield is \mu = 5.5%. Do these data indicate that the dividend yield of all Australian bank stocks is higher than 5.5%? Use \alpha 6.1%What is the value of the test statistic?
a. 1.109
b. 1.107
c. –0.261
d. 0.061

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