| Questions |
Answers |
| What affects the amount of bias in the sampling section process | The amount of sampling error relates to the population characteristics and the size of the sampling distribution |
| Define probability | A numerical value that measures the uncertainty that a particular event will occur |
| What are descriptive statistics concerned with describing | The characteristics of samples and populations by arranging, processing, and interpreting the data known about the samples or populations |
| What disadvantage does the mean have | it is measure of central tendency most affected by extreme values |
| Define range | The difference between the highest and lowest sample values |
| What is the dependent variable in most manpower equations | The dependent variable is usually man-hours or manpower |
| What is your objective in a search for variables | To find an independent variable that causes a predictable change to the dependent variable |
| Identify the regression coefficient(s) in the equation Yc-a+bX | The regression coefficients are "a" and "b" |
| State when a manpower equation is economical | An equation is economical if at any point in the model, a uni increase in workload causes an increase in manpower when compared to all previous per unit changes in manpower |
| When does the power model (Yc+aX^b) meet both the realistic and economic criteria | When a-coefficient is positive and b-coefficient is between zero and one |
| State what assumptions are tested about a regression model | You are interested in determining, at a certain level of significance, whether you are justified in using the regression derived manpower model to explain the existing relationship between man-hours and workload |
| What does the t-test determine | If the individual coefficients of an equation are significantly different from zero |
| What theory deals with a know population and concerns calculating the chance of observing a particular sample again | Probability |
| From a population sample, you have determined that one value occurs more often than any other. What have you determined | Mode |
| What measures would you use to determine the average of a statistical sample | Mean |
| What measure do we not use to calculate the measure of dispersion for a sample population | Mode |
| What measure is calculated if you have determined the measure of dispersion about the mean in square feet from sample values that represent distances measured in feet | Variance |
| What are you focusing on when you use regression analysis | The dependent variable |
| What results from regression analysis and is used to form the regression equaion | Regression coefficients |
| What represents the dependant variable in the equation Yc=a+bX | Y |
| What represents the "Y-intercept" in the equation Y=a+bX | a |
| What represents the "Slope" in the equation Y=a+bX | b |
| What criteria must an equation meet to be acceptable as a manpower model | Economic |
| The linear equation, Y=a+bX, is realistic when | b>= 0 and the a value is not considered |
