Final Exam Practice Fall 2008

Final Exam Practice Fall 2008 - INTRODUCTORY STATISTICS...

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INTRODUCTORY STATISTICS PRACTICE FINAL EXAMINATION Fall 2008 NAME_________________________ I. Matching (4 Points Each) _____ Correct Decision _____ Test Statistic _____ Region of Rejection _____ One-Tailed Test _____ Simple Random Sample _____ Alternate Hypothesis _____ Central Limit Theorem _____ Hypothesis Testing _____ Level of Significance _____ Systematic Sample A.A ____________________ assumes that each item or person in the population has an equal chance of being included. B.The _____________________ states that if the sample size n is sufficiently large, the sampling distribution of the means will be approximately normal no matter whether the population is normally distributed, skewed, or uniform. C.___________________is a procedure based on sample evidence and probability theory to decide whether the hypothesis is a reasonable statement. D.An ____________________ is a statement about a population parameter that is accepted when the null hypothesis is rejected. E.The _____________________ is the risk we assume of rejecting the null hypothesis when it is actually true. F. A ______________ is a value determined from sample information collected to test the null hypothesis. G.The _________________ defines the location of all those values that are so large or so small that the probability of their occurrence under a true null hypothesis is rather remote. H.If the null hypothesis is true and the researchers do not reject it, then a ______________ has been made. I.For a _________________of hypothesis, the area of rejection is only in one tail of the curve. J. To conduct a __________________, the researcher must partition the N items in the frame into n groups of k items where, k = N/n, rounding k to the nearest integer. To select a systematic sample, choose the first item to be selected at random from the first k items in the frame. Then select the remaining n – 1 observations by taking every kth item thereafter from the entire frame.
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Part II. Multiple Choice (5 Points Each) 1. What is it called when all the items in a population have a chance of being selected in a sample? A) Random sampling B) z -score C) Sampling error D) Nonprobability sampling 2. Suppose we select every fifth invoice in a file. What type of sampling is this? A) Random B) Cluster C) Stratified D) Systematic 3. An experiment involves selecting a random sample of 256 middle managers at random for study. One item of interest is their mean annual income. The sample mean is computed to be $35,420 and the sample standard deviation is $2,050. What is the standard error of the mean? A)
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This note was uploaded on 08/09/2011 for the course STAT 302 taught by Professor Kristopher during the Spring '11 term at Delaware State.

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Final Exam Practice Fall 2008 - INTRODUCTORY STATISTICS...

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