R3.24. Tips, take 2 In another experiment to see if getting candyafter a meal would induce customers to leave a bigger tip, awaitress randomly decided what to do with 80 dining parties.Some parties received no candy, some just one piece, andsome two pieces. Others initially got just one piece of candy,and then the waitress suggested that they take another piece.She recorded the tips received, finding that, in general, themore candy, the higher the tip, but the highest tips (23%)came from the parties who got one piece and then wereoffered more. ("Sweetening the Till: The Use of Candy toIncrease Restaurant Tipping," Journal of Applied SocialPsychology 32, no. 2 [2002]: 300-309)a) Diagram this experiment.b) How many factors are there? How many levels?c) How many treatments are there?d) What is the response variable?e) Did this experiment involve blinding? Double-blinding?f) In what way might the waitress, perhaps unintentionally,have biased the results?

In this experiment, we wanted to see- getting candy after a meal would induce customers to leave the…

Answered: R3.24. Tips, take 2 In another…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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Hypnosis. A sample of 100 people was separated into children and adults. The members of each group were randomly assigned to two different hypnosis exercises. The responses of each person were recorded at the completion of the experiment
How many girls? There are two elementary schools in town. School A has 500 students, and School B has 1000 students. a. At which school is it more likely that 55% or more of the students will be girls?b.At which school is it more likely the percentage of girls will be between 45% and 55%
R3.23. Tips In restaurants, servers rely on tips as a major source of income. Does serving candy after the meal produce larger tips? To find out, two waiters determined randomly whether or not to give candy to 92 dining parties. They recorded the sizes of the tips and reported that guests getting candy tipped an average of 17.8% of the bill, compared with an average tip of only 15.1% from those who got no candy. ("Sweetening the Till: The Use of Candy to Increase Restaurant Tipping," Journal of Applied Social Psychology 32, no. 2 [2002]: 300-309) a) Was this an experiment or an observational study? Explain. b) Is it reasonable to conclude that the candy caused guests to tip more? Explain. c) The researchers said the difference was statistically sig- nificant. Explain in this context what that means.
Resources O Hint Inspired by the example about how background music influences choice of entrée at a restaurant, a statistics student decided to investigate other ways to influence a person's behavior. Using 60 volunteers, she randomly assigned 20 volunteers to get a "red" survey, 20 volunteers to get a "blue" survey, and 20 volunteers to get a control survey. The first three questions on each survey were the same, but the fourth and fifth questions were different. For example, the fourth question on the "red" survey was "When you think of the color red, what do you think about?" On the blue survey, the question replaced red with blue. On the control survey, the last two questions were not about color. As a reward, each volunteer was allowed to choose a chocolate candy in a red wrapper or a chocolate candy in a blue wrapper. Here are segmented bar graphs showing the results of the experiment. 100 Red candy Which of the following observations from the 80 Blue candy segmented bar graphs…
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18. Suppose that in a book club, 60% of the members are women, and 35% like to read poetry. If reading poetry is independent of gender, what percent of people in the book club are women who like to read poetry? Group of answer choices 74% 25% 95% 21%
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What research method is being used? A Is it observation B participant observation C interview D survey E experiment
Multiple Choice Question A study took a random sample of adults and asked them about their bedtime habits. The data showed that people who drank a cup of tea before bedtime were more likely to go to sleep earlier than those who didn't drink tea. What was the population being studied? A. All adults that drink tea before bed B. All Adults C. All People D. All adults that don't drink tea
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A psychologist wanta to determine the effect of relaxing music on a person's reaction to a stressful event. Participants were randomly assigned to one of three groups. A participant was brought into a room with no windows and only one door. In the background, either soft classical music, or no music at all was playing. After a set amount of time, a fire alarm went off, and smoke started to come from under the door. A hidden video camera records the participants behavior that is later scored by the experimenter for level of panic from 0-100. Which statistical test would be best to determine if there is a significant difference between groups? One sample t test Dependent samples t test Independent t test ANOVA
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