105 HYPOTHESIS TEST FOR THE POPULATION MEAN WHEN ở IS UNKNOWN 117 112 Given the accompanying sample data, use Excel's formula options to determine if the population mean is greater than 116 at the 5% significance level. Assume that the population is normally distributed. 148 144 106 124 Complete the following analysis. Do not hard code values in your calculations. Use E9 thru E12 and A1:A20 to compute the values 137 Ho: ps Ha: p> 116 116 128 133 107 a = 0.05 123 n = 20 108 106 Sample Mean Mean can only be calculated using values in cells A1 through A20 138 121 Std Deviation Mean can only be calculated using values in cells A1 through A20 129 130 t test Statistic t Statistic can only be calculated using E9, E10, E11, E12, E14, and E16 102 p value Compute the probability that t is greater than the t test Statistic. 141 Conclusion Since the p-value is > 0.05, we do not reject Ho. At the 5% significance level the population mean is less than or equal to 116. Since the p-value is < 0.05, we reject Ho. At the 5% significance level the population mean is greater than to 116.

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 Given the accompanying sample data, use Excel’s formula options to determine if the population mean is greater than 116 at the 5% significance level. Assume that the population is normally distributed.

**Hypothesis Test for the Population Mean When σ is Unknown**

Given the accompanying sample data, use Excel’s formula options to determine if the population mean is greater than 116 at the 5% significance level. Assume that the population is normally distributed.

**Instructions:**

- Complete the following analysis. Do not hard code values in your calculations. Use cells E9 through E12 and A1:A20 to compute the values.

**Hypotheses:**

- \( H_0: \mu \leq 116 \)
- \( H_a: \mu > 116 \)

**Parameters:**

- \( \alpha = 0.05 \)
- \( n = 20 \)

**Calculations:**

- **Sample Mean:** Calculate using values in cells A1 through A20.
  
- **Standard Deviation:** Calculate using values in cells A1 through A20.

- **t-test Statistic:** Calculate using cells E9, E10, E11, E12, E14, and E16.

- **p-value:** Compute the probability that t is greater than the t-test statistic.

**Conclusion:**

- If the p-value is > 0.05, do not reject \( H_0 \). At the 5% significance level, the population mean is less than or equal to 116.
- If the p-value is < 0.05, reject \( H_0 \). At the 5% significance level, the population mean is greater than 116.

Ensure accuracy by strictly using the specified cells for calculations.
Transcribed Image Text:**Hypothesis Test for the Population Mean When σ is Unknown** Given the accompanying sample data, use Excel’s formula options to determine if the population mean is greater than 116 at the 5% significance level. Assume that the population is normally distributed. **Instructions:** - Complete the following analysis. Do not hard code values in your calculations. Use cells E9 through E12 and A1:A20 to compute the values. **Hypotheses:** - \( H_0: \mu \leq 116 \) - \( H_a: \mu > 116 \) **Parameters:** - \( \alpha = 0.05 \) - \( n = 20 \) **Calculations:** - **Sample Mean:** Calculate using values in cells A1 through A20. - **Standard Deviation:** Calculate using values in cells A1 through A20. - **t-test Statistic:** Calculate using cells E9, E10, E11, E12, E14, and E16. - **p-value:** Compute the probability that t is greater than the t-test statistic. **Conclusion:** - If the p-value is > 0.05, do not reject \( H_0 \). At the 5% significance level, the population mean is less than or equal to 116. - If the p-value is < 0.05, reject \( H_0 \). At the 5% significance level, the population mean is greater than 116. Ensure accuracy by strictly using the specified cells for calculations.
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