Comm 291 Statistics Populations STD Dev Chi Tables 2014 Assignment 3 Berkowitz

Comm 291 Statistics Populations STD Dev Chi Tables 2014 Assignment 3 Berkowitz

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COMM 291 – Application of Statistics in Business (Jan–Apr 2014) ASSIGNMENT 3 – Submit On-line to Connect Due 1:00 pm, Wednesday, February 26, 2014 THIS IS PART 1 OF ASSIGNMENT 3. PART 2 IS ONLINE. Instructions and Advice: IMPORTANT! Submit your solutions as a PDF (not as a Word or Excel file). Part 1 of the assignment consists of three questions. Data for Question 3 are in the companion Excel spreadsheet <Asst3_2014_Data.xlsx>. Present the parts of your answers in the same order as the questions are asked. Do not include any original data in your printed submission. Maintain all precision in your calculator or in Excel as you do your multi-step computations. Round off to fewer decimal places only when you write your work and the final answer down to hand in. When formatting numbers in Excel, display only as many decimal places as provide decision-making value to the reader. IMPORTANT: Use the following naming convention for the file you submit on-line. Assignment#_Surname_GivenNames_291_Section.pdf (where #=1, 2, 3, 4, 5, or 6 and Section = 201 or 202 or 203) If I were a student in Section 201, my solutions PDF document for Assignment 3 would be called: Assignment1_Berkowitz_Jonathan_291_201.pdf
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Question 1 – Interpreting or Misinterpreting Correlation a) If we assume that the conditions for correlation are met, which of the following are true? If false, explain briefly. A correlation of 0.02 indicates a strong positive association. False.’ A’ correlation’ o’ f’ ’ zero ’ indicates’ no’ association.’ A’ correlation’ close’ ’ of’ ’ 1’ indicates’ ’ a’ ’ strong’ positive’ association’ and’ ’ a’ ’ correlation’ ’ close’ ’ to’ ---1’ ’ indicates’ ’ a’ ’ strong’ ’ negative’ ’ correlation.’ ’ This’ indicates’ a’ weak’ positive’ association. Standardizing the variables will make the correlation 0. False.’ ’ Standardizing’ ’ does’ ’ not’ ’ change’ ’ the’ ’ shape.’ ’ Standardizing’ ’ Shifts’ ’ the’ ’ mean’ ’ to’ ’ 0,’ changes’ the’ standard’ deviation’ to’ 1,’ and’ removes’ the’ units.
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Comm 291 Statistics Populations STD Dev Chi Tables 2014 Assignment 3 Berkowitz

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