Bundle: Statistics for the Behavioral Sciences, Loose-leaf Version, 10th + Aplia, 1 term Printed Access Card
10th Edition
ISBN: 9781337129039
Author: Frederick J Gravetter, Larry B. Wallnau
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Videos
Question
Chapter 18, Problem 22P
To determine
Do these data indicate a significant difference?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Imagine I wanted to study the effectiveness of the Mediterranean diet on people’s memory. I tested a group of people who strictly followed the Mediterranean diet, another group who followed a typical Western diet, and another whose diet I did not change at all. Before the diet changes began, I gave all my participants a memory test. After six weeks of the diet experiment, I had all participants complete the same memory test again to see how scores would change among the three groups.
For this study, identify a parameter and a statistic I might be interested in.
Is there a link between dark chocolate and weight loss when compared to milk chocolate? A nutritionist gathers 60 people, selected at random, then randomly assigns half of the group to eat a single dark chocolate bar after dinner each night and the other half to eat a single milk chocolate bar after dinner each night for 6 months. Everyone is to keep track of the other food they eat in an app provided. The nutritionist then compares each person’s weight after the 6 months to their weight before eating the different chocolates accounting for the other calories consumed.
12) What type of study does this describe?
a)
Survey
b)
Observational study
c)
Experimental study
OSE 2
Researchers conducted a study to estimate the relationship between a subject's brain activity while watching a
television commercial and subject's subsequent ability to recall the contents of commercials. People think that long
commercial recall is remembered by the people compared with the short one. In order to understand the difference
researcher made 10 long commercial and a short one for each products and commercials are watched by the same
person. Then subjects are asked what they remembered from the commercial and giving the correct answers are
codded by the following table.
1 2345678910
Long Commercial Recall 108668
9786
Short Commercial Recall 4 23444462 2
Ce
Test the claim that long commercials recall is more than short one (The duration of the commercial make a
difference to recall). Calculate the test statistics.
Maksimum 3900 karakter yazabilirsiniz.
Chapter 18 Solutions
Bundle: Statistics for the Behavioral Sciences, Loose-leaf Version, 10th + Aplia, 1 term Printed Access Card
Ch. 18 - 1. Insurance companies charge young drivers more...Ch. 18 - 2. Güven, Elaimis, Binokay, and Tan (2003) studied...Ch. 18 - In problem 9 in Chapter 17, we described a study...Ch. 18 - 4. Problems 5 and 6 in Chapter 17 cited a study...Ch. 18 - 5. A researcher would like to determine whether...Ch. 18 - 6. A recent survey of practicing psychotherapists...Ch. 18 - 7. In 2005, Fung et al. published a study...Ch. 18 - 8. In problem 13 in Chapter 9, wepresented a study...Ch. 18 - Prob. 9PCh. 18 - Prob. 10P
Ch. 18 - Prob. 11PCh. 18 - 12. One of the original methods for testing ESP...Ch. 18 - Prob. 13PCh. 18 - Prob. 14PCh. 18 - 15. In Example 11.2 (p. 343) we presented a...Ch. 18 - Stressful or traumatic experiences can often...Ch. 18 - Prob. 17PCh. 18 - Prob. 18PCh. 18 - Prob. 19PCh. 18 - In Problem 14 in Chapter 11, we described a study...Ch. 18 - In problem 13 in Chapter 17, we Discussed a study...Ch. 18 - Prob. 22PCh. 18 - Prob. 23PCh. 18 - Prob. 24PCh. 18 - Prob. 25P
Knowledge Booster
Learn more about
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
- 1. An older memory study by Eysenck (1974) compared the recall of older participants under one of 5 levels of processing of the learned material. He demonstrated that when asked to perform a higher level of processing a list of words, participants showed better recall at a later time. Eysenck also compared Younger and Older participants on their recall abilities when instructed that they should simply memorize the material for later recall. The data on 10 participants in each group follow, where the DV is the number of items recalled. Younger 21 19 17 15 22 16 22 22 18 21 Older 10 19 14 5 10 11 14 15 11 11 a. Conduct the analysis of variance comparing the means of these two groups. Do this one by hand, including stating your hypotheses, Finding the critical F, and completing the summary table, so that you can compare your test statistic to your critical F. b. Then, interpret your results. 2. Another way to look at Eysenck's study is…arrow_forwardCan someone please help me with part c on question 1?arrow_forwardLaureysens, et al. (2004) studied the concentration of aluminum in wood from a number of clones of poplar growing in an area with heavy pollution. The same clone was sampled and tested once in August and again in November. The researchers believed that the concentration of aluminum would be shown to be increasing over time and hence higher in November than in August. The following table gives the aluminum concentrations for twelve of the clones. Clone 1 2 3 4 5 6 7 8 9 10 11 12 Aug. 8.1 10.0 16.5 13.6 9.5 8.3 18.3 13.3 7.9 8.1 8.9 13.4 Nov. 11.2 16.3 15.3 15.6 10.5 15.5 12.7 11.1 19.9 20.4 14.2 36.8 Diff. 3.1 6.3 1.2 2.0 1.0 7.2 5.6 2.2 12.0 12.3 5.3 23.4 The data are to be analyzed using the Wilcoxon signed rank test. H0: Values of aluminum concentrations in the 2 months have the same distribution. Ha: Values of aluminum concentrations are systematically larger in November than in August. Fix α = 0.05 What is the observed value of the statistic W+ used for the test of hypotheses?…arrow_forward
- evolutionary theories often emphasize that humans have adapted to their physical enviornment. one theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and walking-even iff they are not exposed to the usual pattern of sunlight. to test this notion, eight paid voulenteers were placed (individually) in a room in which there was no light from the outside and no clocks or other indications of time. they could turn the lights on and off as hey wished. after a month in the room, each individual tended to develop a steady cycle. their cycles at the end of the stufy were as follows: 25, 27, 25, 23, 24, 25, 26, and 25. use the steps of hypothesis testing.arrow_forwardassume that the facility has been operational for 6 months. The company was fully staffed on Day 1 but recently has seen an increase in turnover. In response, the HR Director (located in NE) began the process of gathering data from both turnover reports/exit interviews from both locations for the first half of the year (January – June). Below is a breakdown of turnover by Position, Exit Month, Department, Location, Manager, and Reason. Unfortunately, the Reason has not been recorded consistently at the Texas location and the HR Manager (who would know this information) has recently left the company. Based on the data provided, what conclusions could you draw regarding potential issues at these facilities Position Pay Grade Exit Month Department Location Manager Reason Customer Service Rep 7 Janurary Operations TX Smith Job Fit Customer Service Rep 7 February Operations NE Jones Lack of Growth Marketing Manager 13 March Marketing NE Shultz Personal Operations Lead 8…arrow_forward"Coffee drinkers often claim that the caffeine in the coffee makes them more alert. A researcher wonders if this enhanced alertness is merely an illusion or if caffeine actually makes people more alert. To test the effect of caffeine on alertness, the researcher asks people to drink one cup of caffeinated coffee, one cup of plain water, one cup of caffeinated water, or one cup of decaffeinated coffee. After drinking the beverage each participant was given an electroencephalogram (EEG). The researcher hypothesized that the caffeinated beverages would result in greater electrical activity than the non-caffeinated beverages. Which of the following would be most likely to increase the size of the treatment effect in this study? " Only use people in the study who are between the ages of 25 and 35 rather than 25 and 75. Increase the amount of beverage participants drink from one cup to two cups. Have experienced EEG technicians collect data rather than train students…arrow_forward
- Peter Boag, studied the inheritance of beak depth in Galapagos finches by looking at the relationship between parent beak depth (in mm) and that of their offspring. He collected two sets of parent offspring data, once in 1976 and again in 1978. For both years he followed birds to determine which pairs belonged to which nests. Most of the parents had been previously captured so their beak depths were known. He then captured the offspring when they fledged and measured their beak depth. He calculated the "midparent" beak depth (the average beak depth of the two parents) and then compared that to beak depth of their offspring. Use regression analysis to estimate heritability for the trait beak depth from the Galapagos finches data in the above table.arrow_forwardPlease help me answer these and understandarrow_forwardA manager believes that the introduction of a new model of keyboard for administrative staff will increase productivity. If productivity increases substantially, she will replace all the firm's current keyboards with the new models. To test this belief, she asked a sample of 12 administrative staff members to type a standard document on his/her old keyboard, and the number of words per minute were measured. After receiving the new keyboards and spending a few weeks becoming familiar with their operation, each employee then typed the same document using the new model of keyboard. Let Difference = New – Old. 1. This is an example of a: O a. One-sample z-test O b. One-sample t-test O c. One-sample proportion O d. Dependent samples t-test O e. Independent samples t-test 2. The test statistic value for this right-sided test is equal to 2.38. In which interval will the p-value of this hypothesis test fall? ) a. (0, 0.01) O b. (0.01, 0.05) OC. (0.05, 0.10) Od.(0.10, 1)arrow_forward
- Tim is interested in studying whether Cognitive Behavioural Therapy (CBT) is an effective treatment for Obsessive Compulsive Disorder (OCD). Six people who were diagnosed with OCD participated in Tim's study, where he recorded the number of times they washed their hands per day for one month. They were then given a three week intensive CBT program before their hand-washing was monitored for another month. The average number of times per day each participant washed their hands over the two months of observation are as follows: Participant Month 1 Month 2 1 11 6 2 8 5 3 14 17 4 10 10 5 22 11 6 15 10 Compute the appropriate statistic to determine whether the program was effective and use this information to fill in the blanks: Q1. revealed that the number of times per day participants washed their hands following the CBT program was Q2. compared to the number of times per day participants washed their hands before the…arrow_forwardWhat is the predicted height for a child born to a mother with a height of 67 inches and a father with a height of 71 inches?arrow_forwardA researcher conducts an experiment to test whether memory changes with age. They recruited 24 participants separated into four age groups. The groups differ according to the age of subjects. In group one, all participants are 30 years old. Group 2, 40 years old. Group 3, 50 years old. And group 4, 60 years old. Assume that the participants are all in good health and that the groups are matched on other important variables such as years of education, IQ, gender, motivation, and so on. Each participant is shown a series of nonsense syllables ( a meaningless combination of three letters such as Daf or FUM ) at a rate of one syllable every four seconds. The series is shown twice, after which participants are asked to write down as many of the syllables as they can remember. Below is number of syllables remembered by each participant. 30 years old 14 13 15 17 12 10 40 years old 12 15 16 11 12 18 50 years old 17 14 14 9 13 15 60 years old 13 10 7 8 6 9 what is the alternative and null…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill
Linear Algebra: A Modern IntroductionAlgebraISBN:9781285463247Author:David PoolePublisher:Cengage Learning
Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL
Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt
Glencoe Algebra 1, Student Edition, 9780079039897...
Algebra
ISBN:9780079039897
Author:Carter
Publisher:McGraw Hill
Linear Algebra: A Modern Introduction
Algebra
ISBN:9781285463247
Author:David Poole
Publisher:Cengage Learning
Holt Mcdougal Larson Pre-algebra: Student Edition...
Algebra
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Big Ideas Math A Bridge To Success Algebra 1: Stu...
Algebra
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:Houghton Mifflin Harcourt
what is Research Design, Research Design Types, and Research Design Methods; Author: Educational Hub;https://www.youtube.com/watch?v=LpmGSioXxdo;License: Standard YouTube License, CC-BY