mat126 week5 quiz - Grading Summary These are the...

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Unformatted text preview: Grading Summary These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. Date Taken: 8/23/2011 Time Spent: 7 h , 11 min , 25 secs Points Received: 18 / 20 (90%) Question Type: # Of Questions: # Correct: Multiple Choice 20 18 Grade Details 1. Question : Find the median. 2 27 38 55 49 9 53 34 Student Answer: 38 g G ¡ ¢ £ ¤ 36 g G ¡ ¢ £ ¤ 49 g G ¡ ¢ £ ¤ 52 g G ¡ ¢ £ ¤ Instructor Explanation: See section 12.3 of the textbook. Points Received: 1 of 1 Comments: 2. Question : Armia's percentile rank on an exam in a class of 300 is 85. Sanjo's class rank is 42. Who is ranked higher? Student Answer: Armia g G ¡ ¢ £ ¤ Sanjo g G ¡ ¢ £ ¤ Instructor Explanation: See section 12.5 of the textbook. Points Received: 0 of 1 Comments: 3. Question : A data set of size 19 has correlation coefficient of r = –0.432. Test the significance of r at the 5% level and at the 1% level. Student Answer: r is significant at 5% and at 1%. g G ¡ ¢ £ ¤ r is significant at 5%, but not at 1%. g G ¡ ¢ £ ¤ r is is not significant at 5% or at 1%. g G ¡ ¢ £ ¤ Instructor Explanation: See section 12.8 of the textbook. Points Received: 1 of 1 Comments: Page 1 of 7 Student Gradebook Exam 8/31/2011 https://takeexam.next.ecollege.com/(NEXT(a0e2b60cfb))/Main/CourseMode/StudentGrad... 4. Question : Find the median and the mean for the data set below. 5.4 2.0 6.8 3.1 2.9 4.7 2.1 5.0 1.9 3.4 Student Answer: mean = 37.3; median = 3.25 g G ¡ ¢ £ ¤ mean = 3.73; median = 3.4 g G ¡ ¢ £ ¤ mean =37.3; median = 3.4 g G ¡ ¢ £ ¤ mean = 3.73; median = 3.25 g G ¡ ¢ £ ¤ Instructor Explanation: See section 12.3 of the textbook. Points Received: 1 of 1 Comments: 5. Question : Which of the following is not a property of a normal distribution?...
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This note was uploaded on 09/30/2011 for the course MATH126 MATH126 taught by Professor Shenitatalton during the Spring '11 term at Ashford University.

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mat126 week5 quiz - Grading Summary These are the...

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