Answered: Find the z-score for a GPA of 3.04.…

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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Thinking it might be helpful, you ask the EvCC Institutional Researcher for data. He doesn't have the data you need, but suppose he does tell you that the population mean GPA is 2.62 with population standard deviation of 0.69 for all students who have ever attended Everett Community College. Assume that GPA's are normally distributed.

Find the z-score for a GPA of 3.04.
Correct Round to 2 decimal places.

Find the probability a student at random will have a GPA over 3.04.
Round to 4 decimal places.

92.9% of students will have a GPA lower than:
Round to 2 decimal places.

If 14 students are chosen at random, what is the probability their mean GPA will be more than 3.04?
% Round to the nearest whole percent.

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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