Research Methods for the Behavioral Sciences (MindTap Course List)
5th Edition
ISBN: 9781305104136
Author: Frederick J Gravetter, Lori-Ann B. Forzano
Publisher: Wadsworth Publishing
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Textbook Question
Chapter 1, Problem 13E
Determine whether each of the following hypotheses is testable and refutable. If not, explain why.
- The color red as seen by males is different from the color red as seen by females.
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Many questions in research can be expressed as two competing statements about the population parameter. These two statements are called the null and the alternative hypotheses. Usually, the researcher hopes the sample evidence will be in favor of the alternative hypothesis, the new theory. It is important to be able to state the theories that are being put to a test.
For each scenario below, write out the hypotheses to be put to the test and define the parameter of interest in context of the problem.
1. According to the World Bank, 10.7 percent of the world's population lived in poverty in 2013. Researchers wonder if this rate has changed since then (was the rate different in 2022 compared to 2013?).For this scenario, write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. H0:Ha: The parameter p represents ___(provide appropriate definition in context)________
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The national average SAT score is roughly 1500. We
would like to see if the high school seniors who apply
to Duke have higher than average SAT scores. We
randomly sample 100 applicants' files and record
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correct set of hypotheses for this research question?
H0: μ 2 150; HA : μ H National; HA: H Duke H National
Ho: H s 1500; HẠ: µ > 1500
Но: и3 1500; НА: 1500
Sophomore, junior, and senior students at a high school will be surveyed regarding a potential increase in the extracurricular student activities fee. There are three possible responses to the survey question - agree with the increase, do not agree with the increase, or no opinion. A chi-square test will be conducted to determine whether the response to this question is independent of the class in which the student is a member. How many degrees of freedom should the chi-square test have?
Chapter 1 Solutions
Research Methods for the Behavioral Sciences (MindTap Course List)
Ch. 1.2 - Describe tenacity and intuition as methods of...Ch. 1.2 - Describe and identify an example of the method of...Ch. 1.2 - Describe and identify an example of the rational...Ch. 1.2 - Describe and identify an example of the empirical...Ch. 1.3 - Identify and describe the steps of the scientific...Ch. 1.3 - Prob. 6LOCh. 1.3 - Prob. 7LOCh. 1.3 - Prob. 8LOCh. 1.3 - Explain the distinction between science and...Ch. 1.4 - Describe the difference between qualitative and...
Ch. 1.4 - Identify and describe the steps in the research...Ch. 1 - In addition to the key words that were defined in...Ch. 1 - Describe how the cliche You can lead a horse to...Ch. 1 - Describe why you might be cautious about using the...Ch. 1 - Prob. 4ECh. 1 - Pessimists commonly claim that, if you drop a...Ch. 1 - What are the five steps of the scientific method?Ch. 1 - Describe the difference between inductive and...Ch. 1 - State a hypothesis that identifies a specific...Ch. 1 - Is the following hypothesis testable, refutable,...Ch. 1 - Describe what it means to say that science is...Ch. 1 - An expert appears on a shopping network to explain...Ch. 1 - A social science researcher would like to...Ch. 1 - Determine whether each of the following hypotheses...Ch. 1 - In this chapter, we identified a variety of...Ch. 1 - Prob. 2EA
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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
- A researcher thinks that if expectant mothers use vitamins, the birth weight of the babies will increase. The average birth weight of the population is 3.9 kgs. What is the alternative hypothesis? a. Ha: ? > 3.9 b. Ha: ? < 3.9 c. Ha: ? = 3.9 d. Ha: ? ≠ 3.9arrow_forwardAn important issue in court cases is the accuracy of eyewitness testimony. Behavioral scientists have suggested eyewitnesses can be influenced by how a question is phrased. A researcher conducts a study where 15 people watch a film of an accident in which Car A runs a stop sign and hits Car B at a speed of 20 miles per hour. After watching the film, she asks each of the 15 people to estimate Car A's speed at the moment of impact (they do not know the actual speed). However, the question is phrased three different ways. Five people are asked, “How fast was Car A going at the time of the accident with Car B?” Another five are asked, “How fast was Car A going when it hit Car B?” The last five are asked, “How fast was Car A going when it smashed into Car B?” An investigator wants to determine if estimates of speed vary as a function of the wording of the question, with more extreme wordings leading to higher estimates, at 0.05 level. Let Xa be the group of people who were asked using the…arrow_forwardMany questions in research can be expressed as two competing statements about the population parameter. These two statements are called the null and the alternative hypotheses. Usually, the researcher hopes the sample evidence will be in favor of the alternative hypothesis, the new theory. It is important to be able to state the theories that are being put to a test. Write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. According to the World Bank, 10.7 percent of the world's population lived in poverty in 2013. Researchers wonder if this rate has changed since then (was the rate different in 2022 compared to 2013?).For this scenario, write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. H0:Ha: The parameter p represents ___(provide appropriate definition in context)________arrow_forward
- The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Cause Deaths Passenger car occupant 13,100 Motorcycle driver 4,500 Tornado 553 Skydiving 56 h) People sometimes claim motorcycle riding is less dangerous than driving. Does the data support this claim? What additional information and/or calculations would be useful to evaluate this claim?arrow_forwardQUESTION 3Based on the image attached, shows the forecasted temperature for two cities is given in the table below.Explain the reason why the forecast for City A is more reliable than the forecast for the City B. Justify your answer.arrow_forwardQuestion 9 Dr. Jameson wanted to know if IQ scores differed between male and female participants in his study. He gave 28 participants an IQ test and then compared IQ scores for gender differences. He hypothesized that there would be a statistically significant gender difference in IQ scores. Contrary to Dr. Jameson's hypothesis, there were no differences in IQ scores between men and women in his study. From the results of the study, Dr. Jameson must the research hypothesis. the null hypothesis and fail to reject; reject reject; retest reject; fail to reject retest; rejectarrow_forward
- Many questions in research can be expressed as two competing statements about the population parameter. These two statements are called the null and the alternative hypotheses. Usually, the researcher hopes the sample evidence will be in favor of the alternative hypothesis, the new theory. It is important to be able to state the theories that are being put to a test. Suppose that 40% of all supermarkets in the US use recyclable plastic bags. We would like to assess if the proportion of supermarkets in Michigan that use recyclable plastic bags is more than the stated rate. For this scenario, write out the hypotheses to be put to the test and define the parameter of interest in context of the problem. H0:Ha: The parameter p represents ___(provide appropriate definition in context)________arrow_forwardI am having a jard time reading some of this.arrow_forwardI need help with this problem.arrow_forward
- Question 2 A formal hypothesis test is to be conducted using the claim that the mean height of students is equal to 174.1 cm. State the null hypothesis. а. b. State the alternative hypothesis. с. What are the possible conclusions that can be made about the null hypothesis? d. Is it possible to conclude that “there is sufficient evidence to support the claim that the mean height of men is equal to 174.1 cm"?arrow_forwardA school psychologist is interested in the efficiency of administration for a new intelligence test for children. In the past, the Wechsler Intelligence Scale for Children (WISC) was used. Thirty sixth grade children are given the new test to see whether the old intelligence test or the new intelligence test is easier to administer. Is this a non-directional or directional hypothesis? How do you know?arrow_forwardQuestion 4: give the conclusion.arrow_forward
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