Answered: section 6.2, stats/please help with…

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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section 6.2, stats/please help with TI-84 calculator

The state test scores for

randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below.

Assume the population is normally distributed.

1426 1224 990 692 725 835 728 740 544 622 1441 949

a) find the sample mean

________________ (round to one decimal place as needed)

b) find the sample standard deviation

_________________ (round to one decimal place as needed)

A 99% confidence interval for the population mean is (______________ , _______________)

(round to one decimal place as needed)

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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