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What is the null and alternative hypothesis, and what is the hypothesis mean?
Levels of groups' certainties about their eyewitness testimony to a simulated crime were compared. The first group was set up to be "right" in its eyewitness accounts and the second group was set up to be "wrong"; the desire was to see if confidence differed across groups. Thirty-four participants were recruited from a college campus and randomly divided into two groups, both of which were shown a video of a crime scenario (length: 58 seconds) in which the perpetrator's facial characteristics (with respect to the camera) were clearly visible at two separate points and sporadically visible at others. Half the participants then were shown a five-individual lineup that contained the perpetrator in the video ("Group A"), and half the participants were shown a five-individual lineup that did not contain the perpetrator ("Group B"). Participants were asked to (a) identify if and where the perpetrator was in the lineup and (b) provide a rating of confidence on a scale from 1 to 10 (10 being highly confident) that the selection was the same as the person seen in the video committing the crime. All participants signed consent forms, were told they could leave the study at any time, and were told they would be debriefed. Data on the confidence ratings are shown below (also found in the Data Set Scenario 2 Excel file).
Group A Confidence Group B Confidence 07 10 10 05 09 05 10 10 08 07 05 06 10 10 10 09 01 03 10 06 05 04 06 10 07 10 06 10 04 03 05 07 10 08
The table below lists deaths in Georgia in 2004, the estimated population of Georgia in 1994 and the U.S. population according to the 2000 census. Calculations should be done by hand, but feel free to use software to check your work.
The superscripts in parentheses denote the time order in which the runs were made. Comment on the data and analyze them.
Explain the roots or origins of the Progressive Movement by beginning with Grangers and the Alliances and continuing through the formation of the People's Party (Populism).B. What were some of their demands?
Abstract your answer to exercise 2.30 to produce a procedure tree-map with the property that square-tree could be defined as(define (square-tree tree) (tree-map square tree))
In "Behavioral Biases Meet the Market: The Case of Magazine Subscription Prices," published in Advances in Economic Analysis & Policy in 2005
Thirty percent of all people who are inoculated with the current vaccine used to prevent a disease contract the disease within a year.
Does it fall into the confidence interval computed from the sample data? What does this tell you?
If one person is selected at random, what is the probability that person is Female?
In testing whether each of the independent variables (Xs) in a multiple regression equation is statistically significant in explaining the dependent variable (Y), one uses the:
In your organization's management development program, there was a heated discussion between people who claimed that theory is impractical and not effective
the 2002 new york city housing and vacancy survey showed a total of 59324 rent controlled housing units and 236263
customer arrives at a checkout counter in a department store have a poisson distribution with average of 4 arrivals
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