BEHAVIORAL SCIENCES STAT-PKG
2nd Edition
ISBN: 9781337205221
Author: Heiman
Publisher: CENGAGE L
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Textbook Question
Chapter 2, Problem 9SP
(a) What is the difference between the
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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 2 Solutions
BEHAVIORAL SCIENCES STAT-PKG
Ch. 2 - What do these symbols mean? (a) N; (b) f?Ch. 2 - Why must the sum of all fs in a sample equal N?Ch. 2 - (a) What is the difference between a bar graph and...Ch. 2 - What is a dot plotted on a graph called?Ch. 2 - (a) What is the difference between a histogram and...Ch. 2 - (a) What does it mean when a score is in a tail of...Ch. 2 - Prob. 7SPCh. 2 - (a) What is the advantage of computing relative...Ch. 2 - (a) What is the difference between the polygon for...Ch. 2 - What is the difference between the graphs for a...
Ch. 2 - Prob. 11SPCh. 2 - In reading psychological research, you encounter...Ch. 2 - What type of frequency graph is appropriate when...Ch. 2 - The distribution of scores on a statistics test is...Ch. 2 - Prob. 15SPCh. 2 - (a) On a normal distribution of exam scores,...Ch. 2 - Interpret each of the following. (a) You scored at...Ch. 2 - Draw a normal curve and identify the approximate...Ch. 2 - The following shows the distribution of final exam...Ch. 2 - The following normal distribution is based on a...Ch. 2 - Organize the ratio scores below in a table andshow...Ch. 2 - Draw a simple frequency polygon using the data in...Ch. 2 - What type of graph should you create when counting...Ch. 2 - An experimenter studies vision in low light by...Ch. 2 - Prob. 25SP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- 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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