2. Mr. Fritsch wanted to see if there is a connection between the time a given exam takes place and the average score of this exam. He collected data about all the exams from the previous year and arranged the average scores of the exams according to the period they took place, as shown. 100 Given the plot to the right, which statement is the best description of the association between these variables? (Circle One) 80 60 A. Later periods tended to score higher on exams. 40 B. Later periods tended to score lower on exams. 20 C. There is no clear relationship between period and exam scores. 8 Period MORE ON NEXT PAGE Average

2. Mr. Fritsch wanted to see if there is a connection between the time a given exam takes place and the average score of this exam. He collected data about all the exams from the previous year and arranged the average scores of the exams according to the period they took place, as shown. 100 Given the plot to the right, which statement is the best description of the association between these variables? (Circle One) 80 60 A. Later periods tended to score higher on exams. 40 B. Later periods tended to score lower on exams. 20 C. There is no clear relationship between period and exam scores. 8 Period MORE ON NEXT PAGE Average

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Description: 2. Mr. Fritsch wanted to see if there is a connection between the time a given exam takes place and theaverage score of this exam. He collected data about all the exams from the previous year and arranged theaverage scores of the exams according to

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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For each of the following, you will need to draw a sketch of a histogram (it can be a rough sketch)and explain your drawing. For each histogram sketch, consider the x-axis to be prices grouped bycategory, and consider the y-axis to be frequency. The prices can represent whatever type of itemmakes sense for your example.a. Sketch a histogram which shows a data set that is skewed to the left. Explain the features ofyour sketch which make it left-skewed. Describe an example of a type of data set whichmight have this shape.b. Sketch a histogram which shows a data set that is skewed to the right. Explain the features ofyour sketch which make it right-skewed. Describe an example of a type of data set whichmight have this shape.c. Sketch a histogram which shows a data set that is approximately symmetric. Explain thefeatures of your sketch which make it symmetric. Describe an example of a type of data setwhich might have this shape.
Please use the values from the given r values and assign the accurate value to the plots A,B,C, or D.
A professor went to a website for rating professors and looked up the quality rating and also the "easiness" of the six full-time professors in one department. The ratings are 1 (lowest quality) to 5 (highest quality) and 1 (hardest) to 5 (easiest). The numbers given are averages for each professor. Assume the trend is linear, find the correlation, and comment on what it means. Calculate the correlation. r = (Round to three decimal places as needed.) Comment on the meaning of the correlation. Choose the correct interpretation below. OA. The professors that have high easiness scores tend to also have low quality scores.. OB. Being "easy" as a professor causes students to regard the professor as having a higher quality. OC. The professors that have high easiness scores tend to also have high quality scores. OD. Being "easy" as a professor causes students to regard the professor as having a lower quality. Quality Easiness D 4.7 3.7 4.7 3.1 4.2 3.5 4.2 2.6 3.9 1.9 3.5 1.8
Which correlation would allows for the best prediction of Y based on X? Group of answer choices r = .50 r = .80 r = .05 r = -.90
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Last two subpart please
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Suppose a clinical psychologist sets out to see whether sexual orientation is related to relationship longevity. He decides to measure relationship satisfaction in a group of homosexual couples and a group of heterosexual couples. He chooses the Marital Satisfaction Inventory because it refers to "partner" and "relationship" rather than "spouse" and "marriage," which makes it useful for research with both traditional and nontraditional couples. Higher scores on the Marital Satisfaction Inventory indicate greater relationship satisfaction. The psychologist administers the Marital Satisfaction Inventory to 53 couples-23 are homosexual couples and 30 are heterosexual couples. He wants to calculate the correlation between a couple's relationship satisfaction and sexual orientation. Which of the following types of correlations would be most appropriate for the psychologist to use? O A phi-correlation A Spearman correlation OA point-biserial correlation A Pearson correlation
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An instructor finds that she cannot predict a student's performance on an exam based on their attendance at the review session for the exam. This relationship is best reflected in which of the following correlations. r.= +1.00 r= -1.00 r=.50 r = 0.00
r = - 1