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Unformatted text preview: normal distribution with standard deviation $84. A random sample of 30 bills was taken. Find the probability that the sample standard deviation is greater than $62.491. Probability = .975 4. Refer to question 3. Find the probability that the sample variance will exceed the population variance by more than 2,455. Circle the correct answer but also show your work. a. .01 b. .05 c. .10 * d. .90 e. .99 f. approximately 1 5. a. If the expected value of the estimator a θ is equal to the value of the parameter , then a is said to be unbiased . b. If an estimator a is the most efficient of all the estimators under consideration, then a has a smaller variance than do all of the rest of the estimators. c. If for any positive number ε , P[ │ a n │ < ε ] → 1 as the sample size becomes very large, then a is said to be consistent . 2...
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 Spring '08
 HUDGINS
 Normal Distribution, Standard Deviation, Variance, Electricity bills

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