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
