OWL : MOS 2242B 550 FW23 : Tests & Quizzes

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Western University *

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2242B

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Statistics

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Feb 20, 2024

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3

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2024-01-26, 3 : 24 PM OWL : MOS 2242B 550 FW23 : Tests & Quizzes Page 1 of 3 https://owl.uwo.ca/portal/site/3e6f1b82-39e9-42e4-aeea-6b16f31f0567/tool/4d900574-dd77-4337-a29f-d0325efcbe04/jsf/index/mainIndex Tests & Quizzes Quiz 1 Return to Assessment List Part 1 of 2 2.0 / 3.0 Points Question 1 of 8 0.5 0.5 Points In a frequency distribution, the suggested number of classes to represent 29 observations is: 5 Answer Key: 5 Question 2 of 8 0.5 0.5 Points Given the following frequency distribution, compute the corresponding less-than cumulative frequency distribution. GRADE FREQUENCY CUMULATIVE FREQUENCY 0 to 50 5 5 51 to 70 0 5 71 to 80 10 15 81 to 90 7 22 91 to 100 2 24 Answer Key: 5, 5, 15, 22, 24 Question 3 of 8 0.5 0.5 Points Given the following frequency distribution
2024-01-26, 3 : 24 PM OWL : MOS 2242B 550 FW23 : Tests & Quizzes Page 2 of 3 https://owl.uwo.ca/portal/site/3e6f1b82-39e9-42e4-aeea-6b16f31f0567/tool/4d900574-dd77-4337-a29f-d0325efcbe04/jsf/index/mainIndex AGE in years 18 19 20 21 22 FREQUENCY 9 6 5 2 8 The mean age (rounded to 2 decimal places) is 19.8 Answer Key: 19.8 Question 4 of 8 0.0 0.5 Points The population of a village is measured for 5 consecutive years: YEAR 2017 2018 2019 2020 2021 POPULATION 355 488 438 408 544 The average growth rate in the 5-year period (rounded to 2 decimal places) is: 8.91 Answer Key: 0.11 Feedback: Since the request is an average RATE OF GROWTH, you have to use the geometric mean Question 5 of 8 0.5 0.5 Points The range of the following dataset is 41 59 18 28 21 39 29 Answer Key: 41 Question 6 of 8 0.0 0.5 Points A data distribution with mean (-41.71) and standard deviation 1 is given. What is the minimum percentage of data lying between (-41.71)-1.5*1 and (-41.71)+1.5*1? 86.64 % Answer Key: 55.56 Feedback: You may want to review Chebyshev's Theorem Part 2 of 2 0.5 / 1.0 Points
2024-01-26, 3 : 24 PM OWL : MOS 2242B 550 FW23 : Tests & Quizzes Page 3 of 3 https://owl.uwo.ca/portal/site/3e6f1b82-39e9-42e4-aeea-6b16f31f0567/tool/4d900574-dd77-4337-a29f-d0325efcbe04/jsf/index/mainIndex Question 7 of 8 0.5 0.5 Points What type is the variable "final grade"? [please disregard special grades like SPC, PAS, FAI, etc.] A. Quantitative discrete B. Qualitative nominal C. Quantitative continuous D. Qualitative Answer Key: A Feedback: Final grades are integers. Question 8 of 8 0.0 0.5 Points What type of variable is "favourite drink"? A. Nominal B. Qualitative C. Quantitative continuous D. Quantitative discrete Answer Key: B
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