Concept explainers
Take this quiz as you would take a quiz in class. After you are done, check your work against the answers given in the hack of the hook.
For each exercise, perform the steps below.
- (a) Identify the claim and state H0 and Ha.
- (b) Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed, and whether to use a z-test, a t-test, or a chi-square test. Explain your reasoning.
- (c) Choose one of the options.
Option 1: Find the critical value(s), identify the rejection region(s), and find the appropriate standardized test statistic.
Option 2: Find the appropriate standardized test statistic and the P-value.
- (d) Decide whether to reject or fail to reject the null hypothesis.
- (e) Interpret the decision in the context of the original claim.
5. A nutrition bar manufacturer claims that the standard deviation of the number of grams of carbohydrates in a bar is 1.11 grams. A random sample of 26 bars has a standard deviation of 1.19 grams. At α = 0.05, is there enough evidence to reject the manufacturer’s claim? Assume the population is
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Check out a sample textbook solutionChapter 7 Solutions
Elementary Statistics: Picturing the World (6th Edition)
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