Statistics for the Behavioral Sciences, Loose-leaf Version
10th Edition
ISBN: 9781305862807
Author: GRAVETTER
Publisher: CENGAGE L
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Chapter 1, Problem 3P
WW3. Statistical methods are classified into two categories: descriptive and inferential. Describe the general purpose for the statistical methods in each category.
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Chapter 1 Solutions
Statistics for the Behavioral Sciences, Loose-leaf Version
Ch. 1 - A researcher interested in the texting habits of...Ch. 1 - 2. Define the terms population, sample, parameter...Ch. 1 - WW3. Statistical methods are classified into two...Ch. 1 - Define the concept of sampling error and explain...Ch. 1 - Describe the data for a correlational research...Ch. 1 - Describe how the goal of an experimental research...Ch. 1 - Stephens, Atkins, and Kingston (2009) conducted an...Ch. 1 - 8. 2 and age 4 compared to children who drank...Ch. 1 - Gentile, Lynch, Linder, and Walsh (2004) surveyed...Ch. 1 - 10. Weinstein, McDermott, and Roediger (2010)...
Ch. 1 - A research study reports that alcohol consumption...Ch. 1 - 12. In an experiment examining the effects Tai Chi...Ch. 1 - A tax form asks people to identify their annual...Ch. 1 - Four scales of measurement were introduced in this...Ch. 1 - Knight and Haslam (2010) found that office workers...Ch. 1 - 16. Explain why honesty is a hypothetical...Ch. 1 - Ford and Torok (2008) found that motivational...Ch. 1 - 18 . 18. For the following scores, find the value...Ch. 1 - 19. For the following scores, find the value of...Ch. 1 - 20. For the following scores, find the value of...Ch. 1 - Two scores, X and Y, are recorded for each of n =...Ch. 1 - 22. Use summation notation to express each of the...Ch. 1 - 23. For the following set of scores, find the...
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- Find the equation of the regression line for the following data set. x 1 2 3 y 0 3 4arrow_forwardUrban Travel Times Population of cities and driving times are related, as shown in the accompanying table, which shows the 1960 population N, in thousands, for several cities, together with the average time T, in minutes, sent by residents driving to work. City Population N Driving time T Los Angeles 6489 16.8 Pittsburgh 1804 12.6 Washington 1808 14.3 Hutchinson 38 6.1 Nashville 347 10.8 Tallahassee 48 7.3 An analysis of these data, along with data from 17 other cities in the United States and Canada, led to a power model of average driving time as a function of population. a Construct a power model of driving time in minutes as a function of population measured in thousands b Is average driving time in Pittsburgh more or less than would be expected from its population? c If you wish to move to a smaller city to reduce your average driving time to work by 25, how much smaller should the city be?arrow_forwardCholesterol Cholesterol in human blood is necessary, but too much can lead to health problems. There are three main types of cholesterol: HDL (high-density lipoproteins), LDL (low-density lipoproteins), and VLDL (very low-density lipoproteins). HDL is considered “good” cholesterol; LDL and VLDL are considered “bad” cholesterol. A standard fasting cholesterol blood test measures total cholesterol, HDL cholesterol, and triglycerides. These numbers are used to estimate LDL and VLDL, which are difficult to measure directly. Your doctor recommends that your combined LDL/VLDL cholesterol level be less than 130 milligrams per deciliter, your HDL cholesterol level be at least 60 milligrams per deciliter, and your total cholesterol level be no more than 200 milligrams per deciliter. (a) Write a system of linear inequalities for the recommended cholesterol levels. Let x represent the HDL cholesterol level, and let y represent the combined LDL VLDL cholesterol level. (b) Graph the system of inequalities from part (a). Label any vertices of the solution region. (c) Is the following set of cholesterol levels within the recommendations? Explain. LDL/VLDL: 120 milligrams per deciliter HDL: 90 milligrams per deciliter Total: 210 milligrams per deciliter (d) Give an example of cholesterol levels in which the LDL/VLDL cholesterol level is too high but the HDL cholesterol level is acceptable. (e) Another recommendation is that the ratio of total cholesterol to HDL cholesterol be less than 4 (that is, less than 4 to 1). Identify a point in the solution region from part (b) that meets this recommendation, and explain why it meets the recommendation.arrow_forward
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