Use the information provided to answer the questions. Population Sample Size 15 13 Sample Mean 34.9 32.3 Sample Variance 4.6 5.6 A USE SALT State the null and alternative hypotheses for testing for a significant difference in means. O Ho: (u, - u2) = 0 versus H,: (4, - 42) > 0 O H,: (u, - u,) = 0 versus H: (u, - 4,) < 0 O H,: (4, - 42) = 0 versus H,: (4, - 42) # 0 O Ho: (4, - 42) < 0 versus H,: (4, - 42) > 0 O H,: (4, - 4,) * 0 versus H: (u, - H2) = 0 Calculate the pooled estimate of o?, the associated degrees of freedom, and the observed value of the t statistic. (Round s? and your t statistic to three decimal places s2 = 0.727 df = 26 t = 3.049 What is the rejection region using a = 0.05? (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
Question
100%

3. solve for

s2  =

t  =

t    >

t    <

Use the information provided to answer the questions.

| Population | 1   | 2   |
|------------|-----|-----|
| Sample Size | 15  | 15  |
| Sample Mean | 34.9 | 32.3 |
| Sample Variance | 4.6 | 5.6 |

**State the null and alternative hypotheses for testing for a significant difference in means.**

- \( H_0: (\mu_1 - \mu_2) = 0 \) versus \( H_a: (\mu_1 - \mu_2) > 0 \)
- \( H_0: (\mu_1 - \mu_2) = 0 \) versus \( H_a: (\mu_1 - \mu_2) < 0 \)
- **\( H_0: (\mu_1 - \mu_2) = 0 \) versus \( H_a: (\mu_1 - \mu_2) \neq 0 \)**
- \( H_0: (\mu_1 - \mu_2) < 0 \) versus \( H_a: (\mu_1 - \mu_2) > 0 \)
- \( H_0: (\mu_1 - \mu_2) \neq 0 \) versus \( H_a: (\mu_1 - \mu_2) = 0 \)

**Calculate the pooled estimate of \( \sigma^2 \), the associated degrees of freedom, and the observed value of the \( t \) statistic.**

\[
s^2 = 0.727 \quad \text{❌}
\]
\[
df = 26 \quad \text{✔️}
\]
\[
t = 3.049 \quad \text{❌}
\]

**What is the rejection region using \( \alpha = 0.05 \)?** (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.)

- \( t > 2.056 \quad \text{❌} \)
- \( t < 2.056 \quad \text{✔️} \)
Transcribed Image Text:Use the information provided to answer the questions. | Population | 1 | 2 | |------------|-----|-----| | Sample Size | 15 | 15 | | Sample Mean | 34.9 | 32.3 | | Sample Variance | 4.6 | 5.6 | **State the null and alternative hypotheses for testing for a significant difference in means.** - \( H_0: (\mu_1 - \mu_2) = 0 \) versus \( H_a: (\mu_1 - \mu_2) > 0 \) - \( H_0: (\mu_1 - \mu_2) = 0 \) versus \( H_a: (\mu_1 - \mu_2) < 0 \) - **\( H_0: (\mu_1 - \mu_2) = 0 \) versus \( H_a: (\mu_1 - \mu_2) \neq 0 \)** - \( H_0: (\mu_1 - \mu_2) < 0 \) versus \( H_a: (\mu_1 - \mu_2) > 0 \) - \( H_0: (\mu_1 - \mu_2) \neq 0 \) versus \( H_a: (\mu_1 - \mu_2) = 0 \) **Calculate the pooled estimate of \( \sigma^2 \), the associated degrees of freedom, and the observed value of the \( t \) statistic.** \[ s^2 = 0.727 \quad \text{❌} \] \[ df = 26 \quad \text{✔️} \] \[ t = 3.049 \quad \text{❌} \] **What is the rejection region using \( \alpha = 0.05 \)?** (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) - \( t > 2.056 \quad \text{❌} \) - \( t < 2.056 \quad \text{✔️} \)
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