The October 2019 Gallup Poll reported the proportion of Republicans, Independents, and Democrats who favor the legalization of marijuana. Here are the results:Step 1: Test Set-UpStep 2. Select the Level of Significance, αA 5 percent significance level is selected.Step 3. State the Null Hypothesis (H0) and Alternate Hypothesis (H1)H0:H1: Step 4. Compose the Decision RuleStep 5. Calculate the Value of the Test Statistic, p-value, and estimate statistical power (Use G*Power)Use G*Power to calculate statistical power. Use these settings:Test family: z testsStatistical test: Proportion: Difference between two independent proportionsType of power analysis: Post hoc: Compute achieved power – given α, sample size and effect sizeStep 6. Decide and Report Independents279RepublicansDemocratsSuccesses (Favors Legalization)150231Trials283393308Proportions0.530.710.75Research Question: Are Democrats more likely than Independents to favor thelegalization of marijuana? This would be a right-tailed test assuming we place Democrats tothe left of Independents in the null and alternate hypotheses.What type of two-sample hypothesis test should you use?

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Description: The October 2019 Gallup Poll reported the proportion of Republicans, Independents, and Democrats who favor the legalization of marijuana. Here are the results:Step 1: Test Set-UpStep 2. Select the Level of Significance, αA 5 percent significance leve

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The October 2019 Gallup Poll reported the proportion of Republicans, Independents, and Democrats who favor the legalization of marijuana. Here are the results:

Step 1: Test Set-Up

Step 2. Select the Level of Significance, α

A 5 percent significance level is selected.

Step 3. State the Null Hypothesis (H₀) and Alternate Hypothesis (H₁)

H₀:

H₁:

Step 4. Compose the Decision Rule

Step 5. Calculate the Value of the Test Statistic, p-value, and estimate statistical power (Use G*Power)

Use G*Power to calculate statistical power. Use these settings:

Test family: z tests
Statistical test: Proportion: Difference between two independent proportions
Type of power analysis: Post hoc: Compute achieved power – given α, sample size and effect size

Step 6. Decide and Report

Independents
279
Republicans
Democrats
Successes (Favors Legalization)
150
231
Trials
283
393
308
Proportions
0.53
0.71
0.75
Research Question: Are Democrats more likely than Independents to favor the
legalization of marijuana? This would be a right-tailed test assuming we place Democrats to
the left of Independents in the null and alternate hypotheses.
What type of two-sample hypothesis test should you use?

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