Module 4

The average value of a given data set is known as the _____. Mean Standard Deviation Median Mode

A

Which of the following classification techniques best determines a qualitative outcome based on a set of quantitative inputs? LDA Association Analysis Discriminatory Analysis Linear Regression

A

Which of the following operations is permissible with ratio data? All of these Counting Addition and subtraction Multiplication

A

Which of the following techniques allows retrieval of information that is present but buried in data? Descriptive Derivative Predictive Analytic

A

Given two events, A and B, if the probability of either A or B occurring is 0.6, then the probability of neither A nor B occurring is -0.6. True False

F

Which of the following best explains the Central Limit Theorem? If we obtain a large enough sample from any population, the means of those samples will be normally distributed. Values of a sample population will always be normally distributed. Approximately 95% of the probability is contained in the range reaching two standard deviations away from the mean on either side. Approximately 68% of the probability is contained in the range reaching one standard deviation away from the mean.

A

Which of the following operations is permissible with nominal data? Greater or less than comparisons Addition and subtraction Counting All of these

C

Which of the following statements in not true? The marginal probability uses the total possible outcomes in the denominator. The union probability is the probability of X or Y occurring. The joint probability uses the probability of X in the denominator. The conditional probability uses subtotal of the possible outcomes in denominator.

C

Which sampling method divides the population into separate groups and then draws individuals at random, from each group, to obtain a sub-sample? Cluster Simple Random Stratified Systematic

C

Which of the following descriptive mining methods might be used to discover unexpected or atypical associations? Linear Regression LDA Discriminant Analysis Association Analysis

D

Which of the following techniques could be used to help accountants look at line items in fraudulent financial statements and predict future, or expected values? Association Analysis All of the Above Market Basket Analysis Linear Regression

D

If two events are mutually exclusive, then the two events are also independent. True False

F

Statistical hypothesis testing consists of both the _____ hypothesis and the _____hypothesis. null, alternative probable, substantive null, subjective objective, subjective

A

Which of the following indicates how spread out the data are from the center of a data set? Sum of Squared Error All of these Standard deviation Variance

B

What is the probability of rolling an "8" when rolling a pair of dice? 1/6 1/36 5/36 8/36

C

The number of different committees of 2 students that can be chosen from a group of 5 students is: 20 2 5 10 1

D

Bayes' rule is an extension of the law of conditional probabilities to allow revision of original probabilities with new information. True False

T

Inferring the value of a population parameter from the statistic on a random sample drawn from the population is an inferential process under uncertainty. True False

T