In a Simple Linear Regression Problem, the Following Statistics Are $\sum ( x - \bar { x } ) ( y - \bar { y } ) = 2250 , s _ { x } = 10 , \sum x = 50 , \sum y = 75$

question 235

Multiple Choice

In a simple linear regression problem, the following statistics are calculated from a sample of 10 observations: $\sum ( x - \bar { x } ) ( y - \bar { y } ) = 2250 , s _ { x } = 10 , \sum x = 50 , \sum y = 75$ . The least squares estimates of the slope and y-intercept are, respectively,

• A)1.5 and 0.5
• B)2.5 and 1.5
• C)1.5 and 2.5
• D)2.5 and -5.0

---

Definitions:

Behaviourally Anchored Rating Scale

A scale that uses specific descriptions of actual behaviours to rate various levels of performance.

Performance Appraisal

The systematic evaluation of employee performance against set objectives, often used as a basis for decisions on promotions, bonuses, and developmental needs.

Actual Behaviours

The observable actions or reactions of individuals or groups in response to their environment or stimuli.

Coaching

A form of training where an experienced employee offers performance advice to a less experienced co-worker.