6. Roland received a score of 70 on a test for which the mean scorewas 65.5. Roland has learned that the z score for his test is 0.6.What is the standard deviation for this test scores?7. Use the relative frequency distribution in table below todetermine thea. Percent of subscribers who required less than 25 s todownload the fileb. Probability that a subscriber chosen at random will requireatleast 10 s but less than 30 s to downioad the file.Download time( in seconds)Percent of subscribers0-50.65-101.710-154.3Sum is 15.2%15-209.220-2515.125-3019.230-3519.035-4014.9Sum is 69.1%40-459.045-504.550-551.555-601.0A vegotahlo

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Answered: 6. Roland received a score of 70 on a…

6. Roland received a score of 70 on a test for which the mean score was 65.5. Roland has learned that the z score for his test is 0.6. What is the standard deviation for this test scores?

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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