A company is producing steel rods. Assuming that the length of steel rods follows normal distribution…
Given population variance σ² = 0.04, the population standard deviation is σ = √0.04 = 0.20. For a sample size of n = 16, the standard error of the sample mean is σ / √n =…
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A company is producing steel rods. Assuming that the length of steel rods follows normal distribution with mean 10 inches & variance equal to 0.04 sq. inches. The standard error of mean, when a random sample of 16 is taken, will be
Answer and explanation
Correct answer C
Given population variance σ² = 0.04, the population standard deviation is σ = √0.04 = 0.20. For a sample size of n = 16, the standard error of the sample mean is σ / √n = 0.20 / √16 = 0.20 / 4 = 0.05, which equals 2/40.
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