1-Prop Z Test MC

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What is the null hypothesis (Ho) in hypothesis testing?

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The null hypothesis (Ho) is a statement that there is no effect or no difference, and it serves as the default assumption that any observed effect is due to sampling variability.

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What is the alternative hypothesis (Ha) in hypothesis testing?

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The alternative hypothesis (Ha) is a statement that indicates the presence of an effect or a difference, suggesting that the null hypothesis is not true.

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What does a p-value represent in hypothesis testing?

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A p-value represents the probability of obtaining test results at least as extreme as the observed results, assuming that the null hypothesis is true.

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What is the significance level (α) in hypothesis testing?

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The significance level (α) is the threshold for determining whether to reject the null hypothesis, commonly set at 0.05.

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What does it mean to reject the null hypothesis?

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To reject the null hypothesis means that the evidence suggests that the null hypothesis is not true, indicating that the alternative hypothesis may be true.

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What does it mean to fail to reject the null hypothesis?

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Failing to reject the null hypothesis means that there is not enough evidence to conclude that the alternative hypothesis is true.

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What is a statistically significant result?

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A statistically significant result is one where the p-value is less than the significance level (α), indicating strong evidence against the null hypothesis.

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What is the relationship between p-value and significance level?

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If the p-value is less than the significance level (α), we reject the null hypothesis; if it is greater, we fail to reject the null hypothesis.

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What is the purpose of conducting a hypothesis test?

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The purpose of conducting a hypothesis test is to make inferences about a population based on sample data.

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What is a two-tailed test in hypothesis testing?

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A two-tailed test is a hypothesis test where the alternative hypothesis specifies that the parameter is not equal to the null hypothesis value, allowing for deviations in both directions.