Answered: Let the mean of the chance sample drawn…

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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Let the mean of the chance sample drawn from a population whose variance is known as 16 and normally distributed is determined as x = 12.8. What should be the sample width at which the mean is obtained so that the length of the 95% confidence interval for the population mean parameter a is 2.5 units.

a. 38

b. 10

c. 25

d. 40

e. 100

note : i do not need the step by step solution. I just need answer. I have limited time. I will be thankfull if answer is too quick. thx.

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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