A simple random sample of size n = 40 is drawn from a population. The sample mean is found to be 108.6, and the sample standard deviation is found to be 19.6. Is the population mean greater than 100 at the x = 0.01 level of significance? Determine the null and alternative hypotheses. Ho: μ = 100 H₁: μ> 100 tatatinti
A simple random sample of size n = 40 is drawn from a population. The sample mean is found to be 108.6, and the sample standard deviation is found to be 19.6. Is the population mean greater than 100 at the x = 0.01 level of significance? Determine the null and alternative hypotheses. Ho: μ = 100 H₁: μ> 100 tatatinti
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![**Problem Statement:**
A simple random sample of size \( n = 40 \) is drawn from a population. The sample mean is found to be 108.6, and the sample standard deviation is found to be 19.6. Is the population mean greater than 100 at the \( \alpha = 0.01 \) level of significance?
**Steps to solve the problem:**
1. **Determine the null and alternative hypotheses.**
- Null Hypothesis \( (H_0) \): \( \mu = 100 \)
- Alternative Hypothesis \( (H_1) \): \( \mu > 100 \)
2. **Compute the test statistic.**
\[
t_0 = 2.78 \text{ (Round to two decimal places as needed.)}
\]
3. **Determine the P-value.**
\[
\text{The P-value is } 0.004. \text{ (Round to three decimal places as needed.)}
\]
4. **Test Results:**
- Reject or fail to reject the null hypothesis and explain why:
- Reject the null hypothesis because the P-value is less than the level of significance.
- Conclusion at \( \alpha = 0.01 \) level of significance:
- At the \( \alpha = 0.01 \) level of significance, the population mean is greater than 100.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fac3be618-b645-4bd8-855b-808ff3fc18d4%2Ff66a48ca-028b-4b56-950f-e14ac82ef5cc%2Fmtadypa_processed.png&w=3840&q=75)
Transcribed Image Text:**Problem Statement:**
A simple random sample of size \( n = 40 \) is drawn from a population. The sample mean is found to be 108.6, and the sample standard deviation is found to be 19.6. Is the population mean greater than 100 at the \( \alpha = 0.01 \) level of significance?
**Steps to solve the problem:**
1. **Determine the null and alternative hypotheses.**
- Null Hypothesis \( (H_0) \): \( \mu = 100 \)
- Alternative Hypothesis \( (H_1) \): \( \mu > 100 \)
2. **Compute the test statistic.**
\[
t_0 = 2.78 \text{ (Round to two decimal places as needed.)}
\]
3. **Determine the P-value.**
\[
\text{The P-value is } 0.004. \text{ (Round to three decimal places as needed.)}
\]
4. **Test Results:**
- Reject or fail to reject the null hypothesis and explain why:
- Reject the null hypothesis because the P-value is less than the level of significance.
- Conclusion at \( \alpha = 0.01 \) level of significance:
- At the \( \alpha = 0.01 \) level of significance, the population mean is greater than 100.
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
Transcribed Image Text:A simple random sample of size n = 40 is drawn from a population. The sample mean is found to be 108.6, and the sample standard deviation is found to be 19.6. Is the population mean greater than 100 at the α = 0.01 level
of significance?
Determine the null and alternative hypotheses.
Ho: μ = 100
H₁: μ> 100
Compute the test statistic.
to = 2.78 (Round to two decimal places as needed.)
Determine the P-value.
The P-value is 0.004. (Round to three decimal places as needed.)
What is the result of the hypothesis test?
the null hypothesis because the P-value is
the level of significance. At the α = 0.01 level of significance, the population mean
less than 100.
different from 100.
greater than 100.
less than 108.6.
different from 108.6.
greater than 108.6.
Solution
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