9. In the city's entire commercial area, there has been a problem withshoplifting in the March-May months. A police cadet took a randomsample of 10 days (out of the 90 days) and compiled the following data.For each day, x represents the number of police officers on duty in thecommercial area and y represents the number of reported shopliftings onthat day.10151646.181214y16.78.3a) Construct a scatter diagram of x and y values.b) Suppose the computed value of r is -0.969, what does the value tellyou?10. A psychologist is studying pattern-recognition skills under fourlaboratory settings. In each setting, a fourth-grade child is given apattern-recognition test with 10 patterns to identify. In setting I, thechild is given praise for each correct answer and no comment aboutwrong answers. In setting II, the child is given criticism for each wronganswer and no comment about correct answers. In setting III, the childis given no praise or criticism, but the observer expresses interest inwhat the child is doing. In setting IV, the observer remains silent in anadjacent room watching the child through a one-way mirror. A randomsample of fourth-grade children was used, and each child participated inthe test only once.Because each of the groups comes from independent random samples (no childwas tested twice), we need assume only that each group of data came from anormal distribution, and that all the groups came from distributions with about thesame standard deviation.7.6.

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Answered: 9. In the city's entire commercial…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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The data in hours was collected by subtracting 5 from each observation while examining the drying time of a new paint. If the paint is coded, get the sample mean, median, mode, and midrange for the drying periods of 10 panels of wood. 1.4, 0.8, 2.4, 0.5, 1.3, 2.8, 3.6, 3.2, 2.0, and 1.9 hours were measured. Calculate for Mean, median, and mode
The midterm and final exam grades for a statistics course are provided in the data set below. Jaymes, a student in the class, scored 86 on both exams. Treat the given data sets as samples. Midterm: 80, 78, 85, 82, 79, 79, 78, 86, 80, 84, 78, 84, 80, 84, 81, 78, 81, 82, 78, 84 Final: 81, 88, 68, 69, 69 81, 82, 86, 76, 71, 72, 68, 77, 86, 68, 83, 84, 71, 81, 87 z-score for midterm: 1.857 z-score for final: 1.181 Based on the z-scores calculated above, which of Jaymes's grades is more unusual, the midterm grade or the final exam grade? Select the correct answer below: A. The absolute value of the z-score for the final exam grade is greater than for the midterm grade, so the final exam grade is more unusual. B. The absolute value of the z-score for the midterm exam grade is less than for the final grade, so the midterm grade is more unusual. C. The absolute value of the z-score for the midterm exam grade is greater than for the final grade, so the midterm grade is more…
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