SOLUTION: In a sample of 500 families, 70 have a yearly income of less than $40,000, 220 have a yearly income of $40,000 to $80,000, and the remaining families have a yearly income of more t

Question 1129714: In a sample of 500 families, 70 have a yearly income of less than $40,000, 220 have a yearly income of $40,000 to $80,000, and the remaining families have a yearly income of more than $80,000.
a. Write the frequency distribution table for this problem.
b. Calculate the relative frequencies for all classes.
c. Suppose one family is randomly selected from these 500 families.
d. Find the probability that this family has a yearly income of
1. less than $40,000
2. more than $80,000.

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Three classes: under $40,000, between $40T and $80T, and >$80T
70 in the first, 220 in the second 210 in the third.
(14%, 44%, 42%)
less than $40T probability 0.14; greater than $80T probability 0.42
RELATED QUESTIONS
i. In a sample of 500 families, 70 have a yearly income of less than $40,000, 220 have a... (answered by ikleyn)

Suppose that the annual household income in a small Midwestern community is normally... (answered by Theo)

You are in collections with CRA. As of April 30, 2019 you have an outstanding income tax (answered by ikleyn)

An insurance company wishes to examine the relationship between income (in $,000) and the (answered by stanbon)

(20%). Learning outcome 1, 2 and 3 James Corporation gathered the following information: (answered by ikleyn)

In 2006, the median yearly family income was about $48,200. Suppose the average annual... (answered by greenestamps)

TL Ltd is a multinational construction company with subsidiary organisations all around... (answered by ikleyn)

This is the question in my textbook: Fran and Winston have a combined income of $80... (answered by mananth)

We sampled 40 NY teachers for their annual income. In our sample, the average annual... (answered by Theo)