Hi I have the answer for this question but I don't understand what the explanation means. I have an exam tomorrow on this, could you please explain how to find this answer to me going step by step and explaining why thorughout? The image shows the answer along with the question, so I don't need to know the answer necessarily, I just need to know how to answer this type of question in general. A random sample is selected from a normal population with a mean of utreatment is administered to the individuals in the sample, the sample mean is found to be M = 196. How large a sample isnecessary for this sample mean to be statistically significant using a two-tailed test with a = .05?= 200 and a standard deviation of o = 12. After aa. 30Correct. To be statistically significant with a =needs to be 1.96 standard errors away from the norm.Since 196 is 4 away from 200, this means the standard.05, 196b. 35c. 40122.04 =O d. 70Solving,error must be 2.04. This means thatwe get n = 34.6. So we need a population of n = 35. See8.1: The Logic of Hypothesis Testing.

Given information: μ=200, σ=12, M=196α=0.05 Use the excel formula, "=NORM.S.INV(0.975)" for…

Answered: A random sample is selected from a…

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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Hi I have the answer for this question but I don't understand what the explanation means. I have an exam tomorrow on this, could you please explain how to find this answer to me going step by step and explaining why thorughout?

The image shows the answer along with the question, so I don't need to know the answer necessarily, I just need to know how to answer this type of question in general.

A random sample is selected from a normal population with a mean of u
treatment is administered to the individuals in the sample, the sample mean is found to be M = 196. How large a sample is
necessary for this sample mean to be statistically significant using a two-tailed test with a = .05?
= 200 and a standard deviation of o = 12. After a
a. 30
Correct. To be statistically significant with a =
needs to be 1.96 standard errors away from the norm.
Since 196 is 4 away from 200, this means the standard
.05, 196
b. 35
c. 40
12
2.04 =
O d. 70
Solving,
error must be 2.04. This means that
we get n = 34.6. So we need a population of n = 35. See
8.1: The Logic of Hypothesis Testing.

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