A sample proportion is 0.40 and the sample size is 100. What is the approximate standard error of the sample proportion?
Correct answer: C. 0.0490
- A. 0.0049
- B. 0.0240
- C. 0.0490
- D. 0.4000
Explanation
The standard error is calculated as the square root of p(1 minus p) divided by n. Thus, √(0.40 × 0.60 ÷ 100) is approximately 0.0490.
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