# Question: Refer to Exercise 4 48 A 2010 2011 poll conducted by Gallup

Refer to Exercise 4.48. A 2010–2011 poll conducted by Gallup (www.gallup.com/poll/148994/ Emotional-Health-Higher-Among-Older-Americans.aspx) examined the emotional health of a large number of Americans. Among other things, Gallup reported on whether people had Emotional Health Index scores of 90 or higher, which would classify them as being emotionally well-off. The report was based on a survey of 65,528 people in the age group 35–44 years and 91,802 people in the age group 65–74 years. The following table gives the results of the survey, converting percentages to frequencies.

a. Suppose that one person is selected at random from this sample of 157,330 Americans. Find the following probabilities.

i. P(35–44 age group and emotionally not well–off )

ii. P(emotionally well–off and 65–74 age group)

b. Find the joint probability of the events 35–44 age group and 65–74 age group. Is this probability zero? Explain why or why not.

a. Suppose that one person is selected at random from this sample of 157,330 Americans. Find the following probabilities.

i. P(35–44 age group and emotionally not well–off )

ii. P(emotionally well–off and 65–74 age group)

b. Find the joint probability of the events 35–44 age group and 65–74 age group. Is this probability zero? Explain why or why not.

## Answer to relevant Questions

In a group of people, some are in favor of a tax increase on rich people to reduce the federal deficit and others are against it. (Assume that there is no other outcome such as “no opinion” and “do not know.”) Three ...Of the 35 students in a class, 22 are taking the class because it is a major requirement, and the other 13 are taking it as an elective. If two students are selected at random from this class, what is the probability that ...The probability that a student graduating from Suburban State University has student loans to pay off after graduation is .60. The probability that a student graduating from this university has student loans to pay off after ...Find P(A or B) for the following. a. P(A) = .66, P(B) = .47, and P(A and B) = .33 b. P(A) = .84, P(B) = .61, and P(A and B) = .55 The probability that a randomly selected student from a college is a female is .55 and the probability that a student works for more than 10 hours per week is .62. If these two events are independent, find the probability ...Post your question