THIS IS URGENT PLEASE HELP FAST THANK YOU ! NUMBER 7 You have two sets scores re
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Question
THIS IS URGENT PLEASE HELP FAST THANK YOU !
NUMBER 7 You have two sets scores representing the SAT scores of two groups of students. The distributions of scores do not overlap at all – in other words, every single one of the SAT scores in the first group is lower than every single one of the SAT scores in the second group, without any exceptions. Also, no two individuals in either sample have the same SAT scores. Suppose you take the person with the highest score in the second group and move that person to the first group. For each of the following questions, decide if the listed statistic increases, decreases, stays the same, or if there is not enough information to tell. No need to explain your answers.
A. Wh===WHAT happens to the number of people in the first group
. What happens to the number of people in the second group?
C. Wh=== WHAT happens to the range of the first group?
D. Wha-- WHAT happens to the range of the second group?
E. Wh--- WHAT happens to the mean of the first group?
F. Wha--- WHAT happens to the mean of the second group?
PART 2 Now imagine a new scenario. You have the same two distributions you started with before, where every single one of the SAT scores in the first group is lower than every single one of the SAT scores in the second group, without any exceptions, and no two individuals in either sample have the same SAT scores. Suppose you now take the person with the highest score in the first group and move that person to the second group. For each of the following, decide if the listed statistic increases, decreases, stays the same, or if there is not enough information to tell. Again, no need to explain your answers.
G. What happens to the number of people in the first group?
H. WhWhat happens to the number of people in the second group?
I. What What happens to the range of the first group?
J. What What happens to the range of the second group?
K. What What happens to the mean of the first group?
L. What What happens to the mean of the second group?
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NUMBER 6
Can the value of the mean, median, or mode of a set of scores ever be negative? Explain.
Can the value of the range, standard deviation, or variance of a set of scores ever be negative? Explain.
If the standard deviation of a set of scores = 0, what can you say about the scores in the distribution? Verify your answer using an example - that is, create an appropriate (small) set of numbers and actually calculate the SD, showing that it indeed equals 0 – show your work! For this question, you can assume the scores come from a sample rather than a population.
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_ NUMBER 2 --- In part C, only the medication treatment was effective.• In part C, none of the treatments for depression were effective.• In part G, the new arrangement of keys had no impact on typing speed.• In part G, the new arrangement of keys decreased typing speed.Be as specific as you can about the pattern of results that would be consistent with these outcomes. Part C: A clinical psychologist is interested in evaluating three methods of treating depression: medication, cognitive restructuring, and exercise. A fourth treatment condition, a waiting-only treatment group, is included to provide a baseline control group. Sixty depressed students are recruited from the undergraduate student body at a large state university and fifteen are assigned to each treatment method. Treatments are administered for 6 months, after which each student is given a questionnaire designed to measure the degree of depression. The questionnaire is scaled from 0 to 100, with higher scores indicating a higher degree of depression. The mean depression values are then computed for the four treatments and compared to determine the relative effectiveness of each treatment.
Explanation / Answer
NUMBER 7 You have two sets scores representing the SAT scores of two groups of students. The distributions of scores do not overlap at all – in other words, every single one of the SAT scores in the first group is lower than every single one of the SAT scores in the second group, without any exceptions. Also, no two individuals in either sample have the same SAT scores. Suppose you take the person with the highest score in the second group and move that person to the first group. For each of the following questions, decide if the listed statistic increases, decreases, stays the same, or if there is not enough information to tell. No need to explain your answers.
a. WHAT happens to the number of people in the first group.
INCREASEs. You move one additional person to the first group, that is why.
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b. What happens to the number of people in the second group?
DECREASES. You remove one person from the second group to the first group, that's why.
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C. WHAT happens to the range of the first group?
INCREASES. As Range = Max - Min, and the maximum score of the first group increased.
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D. WHAT happens to the range of the second group?
DECREASES. As Range = Max - Min, and the maximum score of the second group decreased.
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E. Wh--- WHAT happens to the mean of the first group?
INCREASES, as the maximum score is surely greater than the previous mean of the first group, it will pull the new mean up.
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F. WHAT happens to the mean of the second group?
DECREASES, as the maximum score is surely greater than the previous mean of the second group, it will pull the new mean down.
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