The Essentials of Statistics: A Tool for Social Research
4th Edition
ISBN: 9781305802698
Author: Joseph F. Healey
Publisher: Cengage Learning US
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Chapter 8, Problem 8.6P
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One hundred people were surveyed, and one question pertained to their educational background. The results of this question and their genders are given in the following table.
Female (F)
Male (F′)
Total
College degree (D)
30
20
50
No college degree (D′)
30
20
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60
40
100
If a person is selected at random from those surveyed, find the probability of each of the following events.1. The person is female or has a college degree. Answer:
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2. The person is male or does not have a college degree. Answer:
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3. The person is female or does not have a college degree.
Chapter 8 Solutions
The Essentials of Statistics: A Tool for Social Research
Ch. 8 - For each of the following, test for the...Ch. 8 - Two sociologists administered questionnaires to...Ch. 8 - Do athletes in different sports vary in terms of...Ch. 8 - PA A number of years ago, the road and highway...Ch. 8 - SOC Are middle-class families more likely than...Ch. 8 - SOC Are college students who live in dormitories...Ch. 8 - GER Are senior citizens who live in retirement...Ch. 8 - As the director of the local Boys Club, you have...Ch. 8 - SOC A survey has been administered to random...Ch. 8 - For each problem, test the sample proportions for...
Ch. 8 - CJ About half of the police officers in Shinbone,...Ch. 8 - SW A large counseling center needs to evaluate...Ch. 8 - SOC At St. Algebra College, the sociology and...Ch. 8 - CJ The mayor of a large city started a crimeline...Ch. 8 - Prob. 8.15PCh. 8 - A researcher is studying the effects of the...
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- At the same restaurant as in Question 19 with the same normal distribution, what's the chance of it taking no more than 15 minutes to get service?arrow_forwardClint, obviously not in college, sleeps an average of 8 hours per night with a standard deviation of 15 minutes. What's the chance of him sleeping between 7.5 and 8.5 hours on any given night? 0-(7-0) 200 91109s and doiw $20 (8-0) mol 8520 slang $199 galbrog seam side pide & D (newid se od poyesvig as PELEO PER AFTE editiw noudab temand van Czarrow_forwardTimes to complete a statistics exam have a normal distribution with a mean of 40 minutes and standard deviation of 6 minutes. Deshawn's time comes in at the 90th percentile. What percentage of the students are still working on their exams when Deshawn leaves?arrow_forward
- Suppose that the weights of cereal boxes have a normal distribution with a mean of 20 ounces and standard deviation of half an ounce. A box that has a standard score of o weighs how much? syed by ilog ni 21arrow_forwardBob scores 80 on both his math exam (which has a mean of 70 and standard deviation of 10) and his English exam (which has a mean of 85 and standard deviation of 5). Find and interpret Bob's Z-scores on both exams to let him know which exam (if either) he did bet- ter on. Don't, however, let his parents know; let them think he's just as good at both subjects. algas 70) sering digarrow_forwardSue's math class exam has a mean of 70 with a standard deviation of 5. Her standard score is-2. What's her original exam score?arrow_forward
- Clint sleeps an average of 8 hours per night with a standard deviation of 15 minutes. What's the chance he will sleep less than 7.5 hours tonight? nut bow visarrow_forwardSuppose that your score on an exam is directly at the mean. What's your standard score?arrow_forwardOne state's annual rainfall has a normal dis- tribution with a mean of 100 inches and standard deviation of 25 inches. Suppose that corn grows best when the annual rainfall is between 100 and 150 inches. What's the chance of achieving this amount of rainfall? wved now of sociarrow_forward
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