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# Manpower 2012 block3

### Flashcards Manpower 2012 block 3

Question | Answer |
---|---|

In an equation what value is defined as the Y-intercept and can be either a positive or a negative value | "a" |

In an equation what value is defined as the Slope and must be positive. | "b" |

What is defined as the proportion of explained variation to total variation (SSR/TSS) and has a .50 minimum accepted value. | R2 ~ Coefficient of variation |

What is defined as the measure of unexplained variation, (Syx/Y bar), Maximum value my not exceed .25, Allows comparison of dispersion in different sets of data. | V ~ Coefficient of Variation |

What is defined as the measure of absolute dispersion, Measure of unexplained variation. | Syx |

What is defined as the Mathematical relationship between the variables. | Regression |

Last Step in C&R analysis, Tells us if the sample's proportion of explained variation to unexplained variation is significant enough to all us to predict population man-hours. | F-Test |

What process increases predicted man-hours by up to 50%, First thing you do after you have a good equation, Increases the applicability of a standard. | Extrapolation |

What is defined as the including both explained and unexplained variation | TSS |

What is defined as the Measure of unexplained variation | SSE |

What is defined as the Measure of explained variation | SSR |

What is defined as having a Minimum acceptable value of .7071, Measures the stength and direction of the relation between X and Y (symbol) | R ~ Coefficient of Correlation |

What is the symbol for Predicted Man-hours | Y Value or Yc |

Step 1 of C&R | COMPUTE SUMMARY STATISTICS; Create spreadsheet using provided data |

What are the 6 critical value formulas in C&R? | b>0, R2 > or = to .5, v < or = to.25, F > F*, Significant F < .05, and R > or = to .7071 |

Step 2 of C&R formula and explain. | ESTIMATE SUMMARY COEFFICIENTS;(b>0 = positive slope, if b is not positive you cannot continue. |

Step 3 of C&R formula and explain. | COMPUTE TOTAL SUM OF SQUARES(TSS); (SSR>SSE) if it is not one or more of the critical values will fail in later steps. |

Formula to get value of Total Sum of Squares (TSS). (TSS = Total Variation in data samples) | (SSR+SSE) |

Is SSR, explained or unexplained? | Explained |

Is SSE, explained or unexplained? | Unexplained |

Step 4 of C&R formulas. | CALCULATE OVERALL STATS; (V = Syx/Y bar),(R2 >or= to .50),(V |

R squared formula (R2) | (SSR/TSS), The higher the value the better |

V formula | (Syx/Y bar) |

Syx formula | √SSE/n-2 |

Step 5 of C&R Formula | COMPUTE F(F = exp/unexp) proportion of explained to unexplained |

F formula | (exp/unexp) proportion of explained to unexplained |

Step 6 of C&R Formula | OBTAIN CRITICAL F VALUE (F*) FROM F-Table using the degrees of freedom(df) for SSE & SSR values to find |

How do you find the value of F*? | use the values of SSE & SSR to find the ___ in the F-Table |

Step 7 of C&R formula | COMPARE F AND F* in the F-Test; (F > F*), if it is then the proportion is significant enough to use at bases. |

F-Test formula | (F > F*)is the last step of C&R's 7 step |

What process is after finishing the last step of C&R? | Determine if Sig F is < .05 |

What process is after determining if Sig F failed or passed? | Determine if R is > than or = to .7071 |

What process is after determining if R failed or passed? | Extrapolation: determine the values of Yu and Yl. |

To get the value of Yl during extrapolation you use what formula? | (lowest data value * .75)to lower the value 25% |

To get the value of Yu during extrapolation you use what formula? | (largest data value * 1.25) to raise value 25% |

What is the objective of Extrapolation? | to extend the data field allowing standard to be applicable to more bases. |

What is the Air force preferred graph? | Linear Bivariant |

A graph that smiles or frowns is called? and can be easily recognized by ____ in its formula. | Parabolic (curvilinear), the exponent. (expl. cx2)the x is squared. |

A two-dimentional graph that describes the type and strength of relationships between two variables. | Scatter diagram |

A characteristic of anything that can be manipulated or made to vary. | variable |

Two variables used in developing manpower standards. | Workload factors(WLF) and man-hours(MH) |

A characteristic the we manipulate to see what happens; its symbol is X. | Independent Variable |

What is often the independent variable in standards developement? | Workload Factor (WLF) |

A Characteristic that changes due to changes in the independent variable; its symbol is Y. | Dependent variable |

What is often the dependent variable in standards developement? | Man-hours (MH) |

On a scatter diagram the horizontal line is? | The X axis |

On a scatter diagram the vertical line is? | Y axis |

The intersection of X and Y on on a scatter chart is? | Data point; if it appears more than once you annotate it by putting a circle around it. |

In a Positive/Direct Relationshiprelationship, what happens to the values of X and Y? | As the value of X (WLF)raises or lowers so too does the value of Y (MH) and vice versa. |

In a Negative/Inverse relationship, what happens to the values of X and Y? | As the value of X (WLF) increase, the value of Y (MH) decreases. The reverse is also true. |

In a Curvilinear relationship, what happens to the values of X and Y? | X (WLF) and Y (MH) start out positive, but end up negative or vice versa. (smile/frown) if you get this you should stop and check data for accuracy. |

b critical value | must be >0 |

R2 critical value | must be > or = to .50 |

V critical value | must be < or = to .25 |

F-Test critical value | F>F* |

Significant F critical value | < .05 tells that it only has less than a 5% chance of failure |

R critical value | > or = to .7071 coefficient of correlation X & Y |

Created by:
MathGods