MGSC 291 Exam 2 Questions and
Answers Graded A+
A consistent estimator for the mean: - Correct answer-converges on the true
parameter μ as the sample size increases.
pi - Correct answer-is the proportion successes in a binomial distribution
important properties of estimators - Correct answer-unbiased
efficient
consistent
Central Limit Theorem - Correct answer-The theory that, as sample size increases,
the distribution of sample means of size n, randomly selected, approaches a normal
distribution.
np>10
n(1-p)>10
Z score for confidence interval - Correct answer-1.645 1.96 2.576
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, Type 1 error - Correct answer-Rejecting null hypothesis when it is true
type 2 error - Correct answer-failing to reject a false null hypothesis
Twenty randomly selected statistics students were given 15 multiple choice
questions and 15 open-ended questions, all on the same material. The professor
was interested in determining if students scored higher on the multiple choice
questions. This experiment is an example of _______. - Correct answer-A paired t-
test
sampling variation - Correct answer-the variation in the composition of small
samples drawn from a large population
sampling distribution - Correct answer-is the probability distribution of all possible
values of a sample statistic for a given sample size (n)
estimator - Correct answer-is a statistic used to infer the value of an unknown
population parameter.
Confidence Interval - Correct answer-the range of values within which a
population parameter is estimated to lie
Confidence Interval
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Answers Graded A+
A consistent estimator for the mean: - Correct answer-converges on the true
parameter μ as the sample size increases.
pi - Correct answer-is the proportion successes in a binomial distribution
important properties of estimators - Correct answer-unbiased
efficient
consistent
Central Limit Theorem - Correct answer-The theory that, as sample size increases,
the distribution of sample means of size n, randomly selected, approaches a normal
distribution.
np>10
n(1-p)>10
Z score for confidence interval - Correct answer-1.645 1.96 2.576
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Type 1 error - Correct answer-Rejecting null hypothesis when it is true
type 2 error - Correct answer-failing to reject a false null hypothesis
Twenty randomly selected statistics students were given 15 multiple choice
questions and 15 open-ended questions, all on the same material. The professor
was interested in determining if students scored higher on the multiple choice
questions. This experiment is an example of _______. - Correct answer-A paired t-
test
sampling variation - Correct answer-the variation in the composition of small
samples drawn from a large population
sampling distribution - Correct answer-is the probability distribution of all possible
values of a sample statistic for a given sample size (n)
estimator - Correct answer-is a statistic used to infer the value of an unknown
population parameter.
Confidence Interval - Correct answer-the range of values within which a
population parameter is estimated to lie
Confidence Interval
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
