Find the minimum sample size n needed to estimate u for the given values of c, o, and E. c=0.98, o = 6.2, and E=2 Assume that a preliminary sample has at least 30 members. (Round up to the nearest whole number.)

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**Sample Size Calculation for Estimating Mean (μ)**

To find the minimum sample size \( n \) needed to estimate the mean \( \mu \), use the following information and formula with given values:

**Given Values:**
- Confidence Level (c): 0.98
- Standard Deviation (\( \sigma \)): 6.2
- Margin of Error (E): 2

**Assumptions:**
- A preliminary sample has at least 30 members.

**Calculation:**

\[ n = \left( \left( \frac{Z \cdot \sigma}{E} \right)^2 \right) \]

Here, \( Z \) corresponds to the z-score for the given confidence level c.

**Instructions:**
- Round up \( n \) to the nearest whole number.
- Enter your answer in the provided answer box.
Transcribed Image Text:**Sample Size Calculation for Estimating Mean (μ)** To find the minimum sample size \( n \) needed to estimate the mean \( \mu \), use the following information and formula with given values: **Given Values:** - Confidence Level (c): 0.98 - Standard Deviation (\( \sigma \)): 6.2 - Margin of Error (E): 2 **Assumptions:** - A preliminary sample has at least 30 members. **Calculation:** \[ n = \left( \left( \frac{Z \cdot \sigma}{E} \right)^2 \right) \] Here, \( Z \) corresponds to the z-score for the given confidence level c. **Instructions:** - Round up \( n \) to the nearest whole number. - Enter your answer in the provided answer box.
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