Entries by Mary

Statistics 2

Statistics 2. Use a calculator to verify that Σx = 24.3, Σx2 = 87.47, Σy = 54.2, Σy2 = 468.56 and Σxy = 194.66. Compute r. (Round to 3 decimal places.)     Use a calculator to verify that Σx = 1.951, Σx2 = 0.550, Σy = 30.4, Σy2 = 150.72 and Σxy = 8.806. Compute r. (Round your answer to three decimal places.)       You are the foreman of the Bar-S cattle ranch in Colorado. A neighboring ranch has calves for sale, and you are going […]

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December 17, 2019 by

Business Statistics

Business Statistics. Q1    The Human Resources Manager of a small company is investigating use of and satisfaction with the staff canteen. He decides to run a small survey of staff members. (a)  Suggest two categorical questions that could be asked in the survey, one nominal and one ordinal. (b)  Suggest two numerical questions that could […]

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December 17, 2019 by

Basic Statistics

Basic Statistics.   The following frequency histogram shows the scores for seventeen students in a quiz.     (2 pts) Find the number of students who scored less than 60 on the quiz.     (2 pts) Find the percentage of students who scored 80 or higher.         (5 pts) Find the […]

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December 17, 2019 by

Statistics

Statistics. Competency Determine and interpret the linear correlation coefficient, and use linear regression to find a best fit line for a scatter plot of the data and make predictions. Scenario According to the U.S. Geological Survey (USGS), the probability of a magnitude 6.7 or greater earthquake in the Greater Bay Area is 63%, about 2 […]

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December 17, 2019 by