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In 1990, the mean height of women 20 years of age or older was 162 cm with a standard deviation of 1.5 cm. Suppose that a random sample of 45 women who are 20 years of age or older today results in a mean height of 164 cm.
a. State the appropriate null and alternative hypotheses to assess whether women are taller today.
b. Determine the critical value at the 0.10 level of significance.
c. Draw a normal curve that shows the rejection region.
d. Write the correct decision and appropriate conclusion.
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