Homework Help?

Question

I need help finding some inform,ation on some data please.
The numbers I work with is...

cholesterol level Frequency
190-194 1
195-199 4
200-204 3
205-209 6
210-214 9
215-219 6
220-224 2
TOTAL 31


The info i need with these numbers is

a. class mark of the fourth class
b. class width
c. upper class limit of the second class



I am unsure how to do these. Please help.

Answer 1

I'm not sure you have all the info you need for us to help. I did look up cumulative frequencies and found:

may be present at carrier frequencies approaching 20% in populations of European descent. Thus, understanding this enzyme is of key importance in furthering our understanding of atherogenesis. Various lines of evidence have suggested that LPL may confer either increased or decreased risk for atherosclerosis depending on its site of expression.

LPL mutations may be present at cumulative frequencies approaching 20% in Caucasian populations. .....

THEN UNDER FREQUENCIES:
The ApoE polymorphism a common genetic factor influencing LDLc: These 3 alleles have variable frequencies across population, e3 being always the most common allele while e4 is more common than e2 (15).
table 1. Mean levels of plasma LDL cholesterol in patients with MI and controls and odds ratios for MI in each genotype class – The ECTIM Study

Answer 2

What is the question? Jezz what are they teaching in our schools? Nothing towards you but what is the teacher teaching here?