ESSENTIALS OF STATISTICS-W/APLIA
4th Edition
ISBN: 9781305611177
Author: HEALEY
Publisher: CENGAGE L
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Chapter 6, Problem 6.4P
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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
50
Total
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.
need help with part b
Suppose you know that Bob's test score is
above the mean, but he doesn't remember by
how much. At least how many students must
score lower than Bob?
Chapter 6 Solutions
ESSENTIALS OF STATISTICS-W/APLIA
Ch. 6 - For each set of sample outcomes below, use Formula...Ch. 6 - For each of the following sets of sample outcomes,...Ch. 6 - For each of the following confidence levels,...Ch. 6 - You have developed a series of questions to...Ch. 6 - SOC A researcher has gathered information from a...Ch. 6 - SOC A random sample of 100 cable TV movies...Ch. 6 - SOC A random sample of 429 college students was...Ch. 6 - PA A random sample of 100 inmates at a maximum...Ch. 6 - SOC The survey mentioned in problem 6.5 found that...Ch. 6 - PA A random sample of 260 workers in a high-rise...
Ch. 6 - A random sample of 1496 respondents of a major...Ch. 6 - A random sample of 100 patients treated in a...Ch. 6 - For the following sample data, construct five...Ch. 6 - For each of the following three sample sizes,...Ch. 6 - Two individuals are running for mayor of your...Ch. 6 - SOC The World Values Survey is administered...Ch. 6 - SOC The fraternities and sororities at St. Algebra...Ch. 6 - You are the automotive specialist for the monthly...
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- If a baby's weight is at the median, what's her percentile?arrow_forwardAt 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_forward
- Times 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_forwardSuppose 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_forward
- Sue'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_forwardClint 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_forward
- One 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_forward13 Suppose that your exam score has a standard score of 0.90. Does this mean that 90 percent of the other exam scores are lower than yours?arrow_forwardBob's commuting times to work have a nor- mal distribution with a mean of 45 minutes and standard deviation of 10 minutes. How often does Bob get to work in 30 to 45 minutes?arrow_forward
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