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Ch. 7 - Hypothesis Testing with One Sample
Larson - Elementary Statistics: Picturing the World 8th Edition
Larson8th EditionElementary Statistics: Picturing the WorldISBN: 9780137493470Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoLarson 8th EditionCh. 7 - Hypothesis Testing with One SampleProblema 7.1.17
Capitolo 7, Problema 7.1.17

Graphical Analysis In Exercises 17–20, match the alternative hypothesis with its graph. Then state the null hypothesis and sketch its graph.


Ha: μ > 3


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Step 1: Understand the alternative hypothesis (Ha: μ > 3). This indicates that the mean μ is greater than 3, so the graph should represent values of μ greater than 3 with shading or emphasis to the right of 3.
Step 2: Analyze the provided graphs. Look for the graph where the shading or emphasis starts at 3 and extends to the right, representing μ > 3. In this case, the correct graph is option 'a'.
Step 3: State the null hypothesis (H0). The null hypothesis is the opposite of the alternative hypothesis, so H0: μ ≤ 3. This means the mean μ is less than or equal to 3.
Step 4: Sketch the graph for the null hypothesis. The graph should represent values of μ less than or equal to 3, with shading or emphasis to the left of 3.
Step 5: Verify the match between the alternative hypothesis and its graph, and ensure the null hypothesis graph is correctly sketched to represent the opposite scenario.

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Null Hypothesis (H0)

The null hypothesis is a statement that there is no effect or no difference, serving as a default position that indicates no change from a known value. In this case, it would state that the population mean (μ) is less than or equal to 3 (H0: μ ≤ 3). This hypothesis is tested against the alternative hypothesis to determine if there is enough evidence to reject it.
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Step 1: Write Hypotheses

Alternative Hypothesis (Ha)

The alternative hypothesis represents a statement that contradicts the null hypothesis, suggesting that there is an effect or a difference. Here, Ha: μ > 3 indicates that the population mean is greater than 3. This hypothesis is what researchers aim to support through statistical testing, often leading to a one-tailed test in this context.
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Step 1: Write Hypotheses

Graphical Representation of Hypotheses

Graphical representations of hypotheses help visualize the relationship between the null and alternative hypotheses. In this case, the graph would illustrate the critical region for the alternative hypothesis (Ha: μ > 3) on the right side of the number line, indicating where we would reject the null hypothesis. Understanding how to sketch these graphs is crucial for interpreting statistical results.
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Step 1: Write Hypotheses
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