MATH 225

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MATH 225N Week 6 Statistics questions latest updates Chamberlain College of Nursing

Question 1 A statistics professor recently graded final exams for students in her introductory statistics course. In a review of her grading, she found the mean score out of 100 points was a x¯=77, with a margin of error of 10. Construct a confidence interval for the mean score (out of 100 points) on the final exam. Answer: (67, 87) Question 2 A random sample of adults were asked whether they prefer reading an e-book over a printed book. The survey resulted in a sample proportion of ...

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MATH 221 FINAL EXAM REVIEW (Version 01) : DEVRY UNIVERSITYQuestion: Determine whether the following are nominal, ordinal, interval, and ratio. Daily temperatures in Ripon, WI Test scores in statistics class Question: The following numbers represent the weights in pounds of six 7-year old children in Mrs. Jones’ 2nd grade class. {25, 60, 51, 47, 49, 45} Find the mean; median; mode; variance; standard deviation. Question: If the variance is 846, what is the standard deviation? Question: If we ha...

MATH 221 FINAL EXAM REVIEW (Version 01) : DEVRY UNIVERSITYFinal ExamMATH 221 FINAL EXAM REVIEW(Version 2) QUESTIONS WITH ANSWERS: DEVRY UNIVERSITY Review Questions You should work each of the following on your own, then review the solutions guide. DO NOT look at the solutions guide first. 1. Determine whether the following are nominal, ordinal, interval, and ratio. a. Daily temperatures in Ripon, WI b. Test scores in statistics class Solution: (a) would be interval as there is no zero w...

1Lexie averages 149 points per bowling game with a standard deviation of 14 points. Suppose Lexie's points per bowling game are normally distributed. Let X= the number of points per bowling game. Then X∼N(149,14). Suppose Lexie scores 186 points in the game on Tuesday. The z-score when x = 186 is - no response given. The mean is - no response given. This z-score tells you that x = 186 is 2.643- no response given standard deviations to the right of the mean. The z...