Z Test One and Two Sample Means: Pick the correct answer. No need explaination What is the statistical tool to be used if the standard deviation is known and the number of sample is 30?Select the correct response:T-Test one sample meanZ-test two sample meanZ-test one sample mean Question 7 of 7If the value of the test statistic is -2.13 and the critical value is ±2.575, what will be your statistical decision?Select the correct response:Accept null hypothesis and reject alternative hypothesisReject null hypothesis and accept alternative hypothesis

Introduction: The Z-test is used to test whether the two population means are different or not when…

Answered: What is the statistical tool to be used…

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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Question

Z Test One and Two Sample Means: Pick the correct answer. No need explaination

What is the statistical tool to be used if the standard deviation is known and the number of sample is 30?
Select the correct response:
T-Test one sample mean
Z-test two sample mean
Z-test one sample mean

Question 7 of 7
If the value of the test statistic is -2.13 and the critical value is ±2.575, what will be your statistical decision?
Select the correct response:
Accept null hypothesis and reject alternative hypothesis
Reject null hypothesis and accept alternative hypothesis

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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