Answer to Question #281041 in Statistics and Probability for JaT

Question

A. The final grades of students in six subjects where he was enrolled were taken and are shown below.

Subject No of units Final grade

Math 100 3 3.0

Lab science 5 1.5

Soc sci 101 3 2.25

Fil 100 2 2.5

P. E 1 3 2.75

NSTP 1 6 1.75

1. Determine his weighted mean grade.

2. If the subjects were equal to the number of units, what would college was average?

Answer 1

1.

mean = $\sum x_if_i/n=\frac{3\cdot3+5\cdot1.5+3\cdot2.25+2\cdot2.5+3\cdot2.75+6\cdot1.75}{22}=2.13$

2.

mean = $\frac{3+1.5+2.25+2.5+2.75+1.75}{6}=2.29$