Posted by **Anonymous** on Monday, November 7, 2011 at 1:40pm.

18. Please answer questions 18-19 using the following information:

Class Scores Frequency - f

Lower limit < score < upper limit

20-30 6

30-40 10

40-50 12

50-60 8

60-70 4

What is the probability that a selected observation is between 40 and 50?

(Points: 5)

0.25

0.30

0.40

0.65

19. What is the probability that a selected observation is greater than 39, but less than 60? (Points: 5)

0.20

0.40

0.30

0.50

## Answer This Question

## Related Questions

- Physics Helpppp - Q11 a(ii)A sinusoidal carrier wave has frequency 500 kHz and ...
- maths - the class-marks of classes in distribution are 6,10,14,18,22,26,30.find...
- stats 101 - how do you find the lower class limit,upper class limit, class width...
- statistics - The data represents the daily rainfall (in inches) for one month. ...
- Math - PLEASE HELP - Can someone help me answer this? Determine F ' (x) and F...
- 12th Calculus - 1. Explain why the function f(x)=(x^2-4)/(x-2) is not continous ...
- Stats - Can someone please explain how to find the frequency from: Lower limit:...
- Calculas - I stumble a question I cannot answer please help up. Find value of ...
- Math - Can someone help me answer this? Determine F ' (x) and F ' (1) if F(x...
- math - Can someone help me answer this? Determine F ' (x) and F ' (1) if F(x...

More Related Questions