business analytics

Glo-bus-1-12 study guide-latest

Glo-bus-1-12 study guide-latest

1. The set of all values of the changing cells that satisfy all constraints, not including the nonnegativity constraints, is called the feasible region. a. True b. False 2. Linear programming is a subset of a larger class of models called: a. mathematical programming models b. mathematical optimality models c. linear regression models d. linear simplex model 3. In using Excel to solve linear programming problems, the target cell represents the: a. value of the objective function b. constraints...

1. Data collected from approximately the same period of time from a cross-section of a population are called: a. time series data b. linear data c. cross-sectional data d. historical data 2. Regression analysis asks: a. if there are differences between distinct populations b. if the sample is representative of the population c. how a single variable depends on other relevant variables d. how several variables depend on each other 3. In regression analysis, the variables used to help explain or...

1. Which of the following is not one of the assumptions of regression? a. There is a population regression line b. The response variable is normally distributed c. The standard deviation of the response variable increases as the explanatory variables increase d. The errors are probabilistically independent 2. The error term represents the vertical distance from any point to the a. estimated regression line b. population regression line c. value of the Y’s d. mean value of the X’s 3. Which ...

1. The chi-square and F-distributions are used primarily to make inferences about population ___________. a. means b. variances c. medians d. modes e. proportions 2. When we replace with the sample standard deviation (s), we introduce a new source of variability and the sampling distribution becomes the: a. t -distribution b. F- distribution c. chi-square distribution d. normal distribution 3. The t-distribution for developing a confidence interval for a mean has degrees of freedom. a. n 2 b...

1. Forecasting models can be divided into three groups. They are: a. time series, optimization, and simulation methods b. judgmental, extrapolation, and econometric methods c. judgmental, random, and linear methods d. linear, non-linear, and extrapolation methods 2. Extrapolation methods attempt to: a. use non-quantitative methods to predict future values b. search for patterns in the data and then use those to predict future values c. find variables that are correlated with the data being pred...

1. The three parameters required to specify a triangular distribution are the minimum, mean and maximum. a. True b. False 2. The binomial distribution is a discrete distribution that is applied to situations where n independent and identical “trials” occur, with each trial resulting in a “success” or “failure,” and we want to generate the random number of successes in the n trials. a. True b. False 3. The binomial distribution can be well approximated by the normal distribution whe...

1. Which of the following is typically not an application of simulation models? a. Operations models b. Financial models c. Marketing models d. Value of Information models e. None of these options 2. Bidding for contracts is an example of which of the following types of simulation model application? a. Operations models b. Financial models c. Marketing models d. Games of chance e. None of these options 3. Cash balance models are an example of which of the following types of simulation applicat...

1. The standard error of sample mean is large when the observations in the population are spread out (large ), but that the standard error can be reduced by taking a smaller sample. a. True b. False 2. A sample in which the sampling units are chosen from the population by means of a random mechanism is a a. probability sample b. judgmental sample c. stratified sample d. systematic sample 3. A judgmental sample is a sample in which the a. sampling units are chosen using a random number table b....