large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. a) What proportion of people scored in the A range (90 or above)? b)What proportion of people failed the exam (60 or below)? Use table below and draw normal distribution

large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. a) What proportion of people scored in the A range (90 or above)? b)What proportion of people failed the exam (60 or below)? Use table below and draw normal distribution

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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boulder 10k race was 1.78 standard deviations faster than women's average group. 405 women ran , assuming normal distribution, how many women ran faster than joan?
The heights of Crepe Myrtle saplings at a local nursery are measured and the data recorded. The data is then plotted and the distribution is found to be bell-shaped. The mean of the set is 67 inches and the standard deviation is 3 inches. A graph of the situation is shown below: 58 61 64 67 70 73 76 a) What percentage of the saplings is more than 70 inches tall? b) What percentage of the saplings is between 61 and 73 inches tall?
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Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway per hour and 85 miles per hour. (Assume the data set has a bell-shaped distribution.) 70 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whese speeds are between 55 miles Approximately% of vehicles travel between 55 miles per hour and 85 miles per hour.
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joans finishing time for the bolder boulder 10k race was 1.77 standard deviations faster than the womens average for her age group. there were 415 women in her group. assuming a normal distribution, how many women ran faster than joan? rounded down to the nearest whole number