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MA260 Statistical Analysis Online Exam 4 Answers (Ashworth College)

MA260 Statistical Analysis Online Exam 4 Answers (Ashworth

MA260 Statistical Analysis Online Exam 4 Answers (Ashworth College) BUY HERE⬊ https://www.homeworkmade.com/ma2 60-statistical-analysis-online-exam-4- answers-ashworth-college/ MA260 Statistical Analysis Online Exam 4 Answers (Ashworth College) Question 1 of 20 5.0/ 5.0 Points If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours? A. About 25% B. About 50% C. About 75% D. About 68% Question 2 of 20 5.0/ 5.0 Points Decide which of the described variables likely have a normal or near-normal distribution. a) The amount of change held by a teacher at the end of each day for a year b) The amount of pocket money held by each student at a mid-sized liberal arts college at a given time c) The number of heads that show when two coins are tossed A. a B. b C. c D. None Question 3 of 20 5.0/ 5.0 Points The scores on a certain test are normally distributed with a mean score of 58 and a standard deviation of 4. What is the likelihood that a sample of 90 students will have a mean score of at least 58.4216? A. 0.8413 B. 0.3413 C. 0.3174 D. 0.1587 Question 4 of 20 5.0/ 5.0 Points The lifetimes of light bulbs of a particular type are normally distributed with a mean of 270 hours and a standard deviation of 11 hours. What percentage of the bulbs has lifetimes that lie within 2 standard deviations of the mean on either side? Apply the 68-95-99.7 rule to this questions. A. 68% B. 1005 C. 99.7% D. 95% Question 5 of 20 5.0/ 5.0 Points The amount of Jen’s monthly electric bill is normally distributed with a mean of $160 and a standard deviation

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