A student at a four-year college claims that mean enrollment at four-year colleges is higher than at two-year colleges in the United States. Two surveys are conducted. Of the 35 four-year colleges surveyed, the mean enrollment was 6,146 with a standard deviation of 510. Of the 35 two-year colleges surveyed, the mean enrollment was 5,086 with a standard deviation of 598. Test the student's claim at the 0.1 significance level.

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**Title: Analyzing Claims on College Enrollments**

---

**Introduction:**
A student at a four-year college claims that mean enrollment at four-year colleges is higher than at two-year colleges in the United States. Two surveys are conducted. Of the 35 four-year colleges surveyed, the mean enrollment was 6,146 with a standard deviation of 510. Of the 35 two-year colleges surveyed, the mean enrollment was 5,086 with a standard deviation of 598. We test the student's claim at the 0.1 significance level.

---

**Preliminary:**

a. **Assumptions:**

Is it safe to assume that:
- \( n_{4yr} \leq 5\% \) of all students enrolled at a 4-year college in the United States and
- \( n_{2yr} \leq 5\% \) of all enrolled at a 2-year college in the United States?

Choices:
- No
- Yes

b. **Sample Size:**

Is \( n_{4yr} \geq 30 \) and \( n_{2yr} \geq 30 \)?

Choices:
- No
- Yes

---

**Test the Claim:**

a. **Hypotheses:**

Determine the null and alternative hypotheses.

- \( H_0: \mu_{4yr} \leq \mu_{2yr} \)
- \( H_a: \mu_{4yr} > \mu_{2yr} \)

b. **Test Statistic:**

Determine the test statistic. **Round to four decimal places.**

- \( t = \underline{\hspace{2cm}} \)

c. **p-Value:**

Find the p-value. **Round to 4 decimals.**

- p-value = \(\underline{\hspace{2cm}}\)

d. **Decision:**

Make a decision:
- Fail to reject the null hypothesis.
- Reject the null hypothesis.

e. **Conclusion:**

Write the conclusion:
- There is not sufficient evidence to support the claim that enrollment is higher at a four-year college than a two-year college.
- There is sufficient evidence to support the claim that enrollment is higher at a four-year college than a two-year college.

---

**Conclusion:**
This guide outlines the process of evaluating a claim about college enrollments using hypothesis testing. Follow the steps above to assess the validity of claims using
Transcribed Image Text:**Title: Analyzing Claims on College Enrollments** --- **Introduction:** A student at a four-year college claims that mean enrollment at four-year colleges is higher than at two-year colleges in the United States. Two surveys are conducted. Of the 35 four-year colleges surveyed, the mean enrollment was 6,146 with a standard deviation of 510. Of the 35 two-year colleges surveyed, the mean enrollment was 5,086 with a standard deviation of 598. We test the student's claim at the 0.1 significance level. --- **Preliminary:** a. **Assumptions:** Is it safe to assume that: - \( n_{4yr} \leq 5\% \) of all students enrolled at a 4-year college in the United States and - \( n_{2yr} \leq 5\% \) of all enrolled at a 2-year college in the United States? Choices: - No - Yes b. **Sample Size:** Is \( n_{4yr} \geq 30 \) and \( n_{2yr} \geq 30 \)? Choices: - No - Yes --- **Test the Claim:** a. **Hypotheses:** Determine the null and alternative hypotheses. - \( H_0: \mu_{4yr} \leq \mu_{2yr} \) - \( H_a: \mu_{4yr} > \mu_{2yr} \) b. **Test Statistic:** Determine the test statistic. **Round to four decimal places.** - \( t = \underline{\hspace{2cm}} \) c. **p-Value:** Find the p-value. **Round to 4 decimals.** - p-value = \(\underline{\hspace{2cm}}\) d. **Decision:** Make a decision: - Fail to reject the null hypothesis. - Reject the null hypothesis. e. **Conclusion:** Write the conclusion: - There is not sufficient evidence to support the claim that enrollment is higher at a four-year college than a two-year college. - There is sufficient evidence to support the claim that enrollment is higher at a four-year college than a two-year college. --- **Conclusion:** This guide outlines the process of evaluating a claim about college enrollments using hypothesis testing. Follow the steps above to assess the validity of claims using
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