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Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter11: Data Analysis And Displays

Section: Chapter Questions

Problem 5CR

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Need help with my homework, if possible can the work be shown to see where I’m messing up? Thank you 1) The scores in the ASVAB are normally distributed with a mean of 50 and a standard of deviation of 10. If the new Space Force only wants to admit people in the top 8 percent of the takers, what is the cutoff score to be admitted into the Space Force? You may use your calculator and round your answer up to the next integer. 2) Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 125 mm. with a variance of 49. If a random sample of 41 stell bolts is selected, what is the probability that the sample mean would be greater than 126.9 millimeters? Round your answer to four decimal places.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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