QUANTITATIVE ANALYSIS FOR BUSINESS

4. 4- The final grades of a student in his subjects where he was enrolled were taken and shown below.

Subject No. of Units Final grade

Math 1 3 2.5

Lab Science 5 1.5

English 1 3 2.25

Com Lab 2 3.0

Filipino 3 2.25

Accounting 1 6 2.5

1. A- Determine his weighted mean grade.

B- If the subjects were of equal number of units, what would be his average?

6.The results of an IQ test of a group of students in a certain college were taken and are presented in a frequency distribution.

Classes f

70-75 2

76-81 8

82-87 19

88-93 21

94-99 28

100-105 38

106-111 15

112-117 9

I .Using the frequency distribution above, determine the following:

a) size of the class interval;

b) median class;

c) lower boundary of the median class;

d) midpoint of the median class;

e) upper limit of the median class;

f) modal class;

g) lower limit of the modal class;

h) number of students with an IQ greater than 99.5;

i) midpoint of the modal class.

II.Compute the value of the mean, median, and mode.