Behavioral Sciences STAT (with CourseMate Printed Access Card) (New, Engaging Titles from 4LTR Press)
2nd Edition
ISBN: 9781285458144
Author: Gary Heiman
Publisher: Cengage Learning
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Chapter 1, Problem 3SP
(a) What is a population? (b) What is a sample? (c) How are samples used to make conclusions about populations? (d) What are researchers really referring to when they talk about the population?
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Test d'égalité des espérances: observations pairées
Chapter 1 Solutions
Behavioral Sciences STAT (with CourseMate Printed Access Card) (New, Engaging Titles from 4LTR Press)
Ch. 1 - What is the goal of behavioral research?Ch. 1 - Why is it important for students of behavioral...Ch. 1 - (a) What is a population? (b) What is a sample?...Ch. 1 - (a) What is a variable? (b) What is a quantitative...Ch. 1 - What pattern among the X and Y scores do you see...Ch. 1 - What is the difference in the pattern among the X...Ch. 1 - Prob. 7SPCh. 1 - Prob. 8SPCh. 1 - Prob. 9SPCh. 1 - In an experiment, what is the dependent variable?
Ch. 1 - What is the difference between the independent...Ch. 1 - (a) What are descriptive statistics used for?...Ch. 1 - Prob. 13SPCh. 1 - Prob. 14SPCh. 1 - Prob. 15SPCh. 1 - What are the two aspects of a study to consider...Ch. 1 - Researcher A gives participants various amounts of...Ch. 1 - Maria asked a sample of college students about...Ch. 1 - In the following experiments, identify the...Ch. 1 - Use the words relationship, sample, population,...Ch. 1 - Which sample in problem 21 shows the most...Ch. 1 - What pattern do we see when the results of an...Ch. 1 - Indicate whether a researcher would conduct an...Ch. 1 - In the chart below, identify the characteristics...
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- Suppose that Sue and Bill each make a confidence interval out of the same data set, but Sue wants a confidence level of 80 percent compared to Bill’s 90 percent. How do their margins of error compare?arrow_forwardSuppose that you conduct a study twice, and the second time you use four times as many people as you did the first time. How does the change affect your margin of error? (Assume the other components remain constant.)arrow_forwardOut of a sample of 200 babysitters, 70 percent are girls, and 30 percent are guys. What’s the margin of error for the percentage of female babysitters? Assume 95 percent confidence.What’s the margin of error for the percentage of male babysitters? Assume 95 percent confidence.arrow_forward
- You sample 100 fish in Pond A at the fish hatchery and find that they average 5.5 inches with a standard deviation of 1 inch. Your sample of 100 fish from Pond B has the same mean, but the standard deviation is 2 inches. How do the margins of error compare? (Assume the confidence levels are the same.)arrow_forwardA survey of 1,000 dental patients produces 450 people who floss their teeth adequately. What’s the margin of error for this result? Assume 90 percent confidence.arrow_forwardThe annual aggregate claim amount of an insurer follows a compound Poisson distribution with parameter 1,000. Individual claim amounts follow a Gamma distribution with shape parameter a = 750 and rate parameter λ = 0.25. 1. Generate 20,000 simulated aggregate claim values for the insurer, using a random number generator seed of 955.Display the first five simulated claim values in your answer script using the R function head(). 2. Plot the empirical density function of the simulated aggregate claim values from Question 1, setting the x-axis range from 2,600,000 to 3,300,000 and the y-axis range from 0 to 0.0000045. 3. Suggest a suitable distribution, including its parameters, that approximates the simulated aggregate claim values from Question 1. 4. Generate 20,000 values from your suggested distribution in Question 3 using a random number generator seed of 955. Use the R function head() to display the first five generated values in your answer script. 5. Plot the empirical density…arrow_forward
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