ECON 230 Exam 3 study questions 1

# ECON 230 Exam 3 study questions 1 - Econ 230 Exam 3...

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Unformatted text preview: Econ 230, Exam 3 Practice Questions 1. T width of a conﬁdence interval depends on the size of the: A) argin of error sample mean C) population mean D) none of these 2. Suppose you have found the 90% conﬁdence interval for the population proportion to be between 0.62 and 0.73. In plain English, write down the interpretation of this conﬁdence I interval. QO/ at Slew; ppﬁg‘ian CK“ lNrCJJQF iL‘L UAW) of fez and [VS 3. You are estimating the proportion of LMU students who support Prop. 32. You ask 200 randomly selected students and ﬁnd that 100 students support Prop. 32. You then say that 50% of all LMU students support Prop. 32. This estimation procedure is known as: A) conﬁdence estimation Chebyshev estimation point estimation D) interval estimation 4. Estimation is a procedure by which we assign a numerical value or numerical values to the: A) sample statistic based on the information collected from a population B opulation parameter based on the information collected from a population C) opulation parameter based on the information collected from a sample ) sample statistic based on the information collected from a sample 5. The 3 value for a 95% conﬁdence interval for the Q 1.96 B) 2.17 C) 1.65 D) 2.05 pulation proportion is: 6. on can decrease the width of a conﬁdence interval by: lowering the conﬁdence level or increasing the sample size B) lowering the conﬁdence level or decreasing the sample size C) increasing the conﬁdence level or increasing the sample size D) increasing the conﬁdence level or decreasing the sample size ...
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• Fall '12
• AnnaTerzyan

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