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Unbiased estimate for the population variance

Question: A random sample is taken from a population. The data points are: 5 4 9 2 1

a) What is the mode?

b) Calculate the unbiased estimate for the population variance.

c) Another random sample is taken from the population with an unbiased estimate of the population variance of 9.2. Does this result imply anything about whether the estimator is truly unbiased or not? Explain your answer.

d) A random sample of 92 observations is taken from another population. The sample mean is 5.5. The unbiased estimate for the population variance is 6.4. Test whether the population mean is equal to 3 or not at a significance level of 5%.

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Solution Preview :

Prepared by a verified Expert

Basic Statistics: Unbiased estimate for the population variance

Reference No:- TGS0683374

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Recent Questions Asked Basic Statistics

Q : What is the character of the gain or loss

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Basic Statistics: Unbiased estimate for the population variance

Reference No:- TGS0683374

Recent Questions Asked Basic Statistics

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