# Question: In a sample of 500 families 70 have a yearly

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. Write the frequency distribution table for this problem. Calculate the relative frequencies for all classes. Suppose one family is randomly selected from these 500 families. Find the probability that this family has a yearly income of

a. Less than $40,000

b. More than $80,000

a. Less than $40,000

b. More than $80,000

**View Solution:**## Answer to relevant Questions

Two students are randomly selected from a statistics class, and it is observed whether or not they suffer from math anxiety. How many total outcomes are possible? Draw a tree diagram for this experiment. Draw a Venn diagram. Two thousand randomly selected adults were asked whether or not they have ever shopped on the Internet. The following table gives a two-way classification of the responses. a. If one adult is selected at random from these ...Of a total of 100 DVDs manufactured on two machines, 20 are defective. Sixty of the total DVDs were manufactured on Machine 1, and 10 of these 60 are defective. Are the events “Machine I” and “defective” independent? How is the multiplication rule of probability for two dependent events different from the rule for two independent events? Given that P (A) = .72 and P (A and B) = .38, find P (B | A).Post your question