Are couples that live together before they get married more likely to end up divorced within five years of marriage compared to couples that live apart before they get married? 208 of the 684 couples from the study who lived together before they got married were divorced within five years of marriage. 120 of the 457 couples from the study who lived apart before they got married were divorced within five years of marriage. What can be concluded at the = 0.10 level of significance? For this study, we should use z-test for the difference between two population proportions a. The null and alternative hypotheses would be:

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## Study on Divorce Rates: Cohabitation vs. Living Apart Before Marriage

#### Research Question:
Are couples that live together before they get married more likely to end up divorced within five years of marriage compared to couples that live apart before they get married?

#### Data:
- **Lived Together Before Marriage:** 
  - Number of couples: 684
  - Divorced within five years: 208
- **Lived Apart Before Marriage:** 
  - Number of couples: 457
  - Divorced within five years: 120

#### Objective:
Determine what can be concluded at the \(\alpha = 0.10\) level of significance.

#### Methodology:
For this study, we should use a **z-test for the difference between two population proportions**.

#### Steps:

1. **Formulate Hypotheses:**
   - Null Hypothesis (\(H_0\)): \( p_1 = p_2 \)
   - Alternative Hypothesis (\(H_1\)): \( p_1 > p_2 \)

2. **Calculate the Test Statistic:**
   - The test statistic (\( z \)) is to be computed. Ensure to show the answer to three decimal places.

3. **Determine p-value:**
   - Compute the p-value and show it to four decimal places.

This will help determine if there’s a statistically significant difference in divorce rates within the first five years of marriage between couples who cohabitate and those who do not before getting married.
Transcribed Image Text:## Study on Divorce Rates: Cohabitation vs. Living Apart Before Marriage #### Research Question: Are couples that live together before they get married more likely to end up divorced within five years of marriage compared to couples that live apart before they get married? #### Data: - **Lived Together Before Marriage:** - Number of couples: 684 - Divorced within five years: 208 - **Lived Apart Before Marriage:** - Number of couples: 457 - Divorced within five years: 120 #### Objective: Determine what can be concluded at the \(\alpha = 0.10\) level of significance. #### Methodology: For this study, we should use a **z-test for the difference between two population proportions**. #### Steps: 1. **Formulate Hypotheses:** - Null Hypothesis (\(H_0\)): \( p_1 = p_2 \) - Alternative Hypothesis (\(H_1\)): \( p_1 > p_2 \) 2. **Calculate the Test Statistic:** - The test statistic (\( z \)) is to be computed. Ensure to show the answer to three decimal places. 3. **Determine p-value:** - Compute the p-value and show it to four decimal places. This will help determine if there’s a statistically significant difference in divorce rates within the first five years of marriage between couples who cohabitate and those who do not before getting married.
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