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5. A consumer advocate wants to find out whether the soft drinks sold at a fast-food restaurant contain less than the advertised 16 ounces. A random sample of 30 independently chosen drinks produced a mean of 15.8 ounces with a standard deviation of 0.4 ounces. Show all 4 steps of the hypothesis test, use a 5% significance level.
a. Hypothesize (state null and alternative hypotheses using proper notation)
b. Prepare (check the conditions of the Central Limit Theorem).
c. Compute (identify calculator option, report test statistic and p-value).
d. Interpret (make a decision and write a conclusion in a complete sentence).

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