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Using the Taro Yamane formula with a population of 1,771,094 and a level of precision of 0.05, calculate the sample size n.

Mathematics

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Answer

400\text{400}

Step-by-step solution

7 steps
  1. State the Taro Yamane formula and given values.

    The Taro Yamane formula for sample size (nn) for finite populations is:

    n=N1+N(e2)n = \frac{N}{1 + N(e^2)}

    Where:
    NN = Population size
    ee = Level of precision

    Given values from the problem:
    N=1,771,094N = 1,771,094
    e=0.05e = 0.05

  2. Substitute the given values into the formula.

    Substitute N=1,771,094N = 1,771,094 and e=0.05e = 0.05 into the formula:

    n=1,771,0941+1,771,094(0.052)n = \frac{1,771,094}{1 + 1,771,094(0.05^2)}
  3. Calculate the square of the level of precision (e2e^2).

    e2=(0.05)2=0.0025e^2 = (0.05)^2 = 0.0025

    Substitute this back into the equation:

    n=1,771,0941+1,771,094(0.0025)n = \frac{1,771,094}{1 + 1,771,094(0.0025)}
  4. Multiply the population size by e2e^2.

    1,771,094×0.0025=4427.7351,771,094 \times 0.0025 = 4427.735

    Substitute this back into the equation:

    n=1,771,0941+4427.735n = \frac{1,771,094}{1 + 4427.735}
  5. Add 1 to the result from Step 4.

    1+4427.735=4428.7351 + 4427.735 = 4428.735

    Substitute this back into the equation:

    n=1,771,0944428.735n = \frac{1,771,094}{4428.735}
  6. Divide the population size by the denominator.

    n=1,771,0944428.735≈399.9099n = \frac{1,771,094}{4428.735} \approx 399.9099
  7. Round the sample size to the nearest whole number.

    Since the sample size must be a whole number, round 399.9099 to the nearest integer.

    n≈400n \approx 400

    The calculations shown in the image are correct.
    The final calculated sample size is 400\text{400}.

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