Research Methods for the Behavioral Sciences (MindTap Course List)
Research Methods for the Behavioral Sciences (MindTap Course List)
6th Edition
ISBN: 9781337613316
Author: Frederick J Gravetter, Lori-Ann B. Forzano
Publisher: Cengage Learning
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Textbook Question
Chapter 2, Problem 12E

Determine whether each of the following hypotheses is testable and refutable. If not, explain why.

a. Young children can see good or evil auras surrounding the people they meet.

b. A list of three-syllable words is more difficult to memorize than a list of one-syllable words.

c. The incidence of paranoia is higher among people who claim to have been abducted by aliens than in the general population.

d. If atomic weapons were never invented, then there would be less anxiety in the world.

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The academic planner of a university thinks that less than 35% of the entire student body attends summer school. The correct set of hypotheses to verify his belief is _____.
An economist has collected data on the number of house foreclosures. The published share of housing units with a foreclosure filing is 0.47%. The economist believes, based on the data she collected, that the share of housing units with a foreclosure filing is different from 0.47%. What are the null and alternative hypotheses?  Select the correct answer below:   H0: μ≠0.47%; Ha: μ=0.47%   H0: μ=0.47%; Ha: μ≥0.47%   H0: μ=0.47%; Ha: μ≤0.47%   H0: μ=0.47%; Ha: μ≠0.47%
A golf pro shop is deciding whether to carry a new, more expensive line of golf balls that claim to travel further. To test the new balls, the pro shop manager asked the club’s golf pro to hit 100 of the top selling brand of balls and 100 of the new balls. The distance traveled by both the new and current balls was recorded. For this scenario, which of the following would be the proper set of hypotheses? a. H0: µD = 0 H1: µD > 0 b H0: µD = 0 H1: µD < 0 c. H0: µnew - µcurrent = 0 H1: µnew - µcurrent < 0 d. H0: µnew - µcurrent = 0 H1: µnew - µcurrent > 0   II. What is the dependent variable in this study?
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  • Buyers are skeptical of an ATV advertisement that claims the newest model 4-wheeler gets an average of 17 miles per gallon. They believe the dealer is understating the average. Which null and alternative hypotheses should the buyer's test? Let µ represent the true average gas mileage. Group of answer choices H0: µ > 17 miles per gallon, Ha: µ ≥ 17 miles per gallon H0: µ ≤ 17 miles per gallon, Ha: µ < 17 miles per gallon H0: µ = 17 miles per gallon, Ha: µ > 17 miles per gallon H0: µ = 17 miles per gallon, Ha: µ < 17 miles per gallon H0: µ = 17 miles per gallon, Ha: µ ≠ 17 miles per gallon
    1.Respond to the following questions in accordance with characteristics of hypothesis testing. a.If you want to see if the average gestational length among African American women is different from the national average of 39 weeks, how would you set up the null and two-sided alternative hypotheses? b.If you want to see if the average gestational length among African American women is less than the national average of 39 weeks, how would you set up the null and one-sided alternative hypotheses? c.In other words, what is a P-value? d.If α is 0.10 and you find a P-value of 0.08 in your hypothesis test, what would you conclude? e.How do you calculate the standard error of ?̅?
    Determine the null and alternative hypotheses based on the following:  Historically, the time to order and deliver a pizza at Jimbo’s pizza was 48 minutes. Jim, the owner, implements a new system for ordering and delivering pizzas that he believes will reduce the time required to get a pizza to his customers.
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