Answered: An experiment was conducted to compare…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

An experiment was conducted to compare the effectiveness of 2 programs in training assemblers of a piece of electronic equipment. Ten persons were randomly assigned to each of the training program. After completion of the training, each person was required to assemble a piece of the equipment, and the length of time required to complete the assembly was recorded. A test of hypothesis will be conducted to determine if the data provide evidence to indicate a difference in mean assembly times for people trained by the 2 programs.

What are the critical value(s) that will be used in the conduct of the above test of hypotheses

a)-1.960, 1.960

b)-1.734, +1.734

c)-1.645, 1.645

d)-2.101, 2.101

I know option A and D are wrong but I cant figure out the right one. I need help in solving this MCQ and getting the right answer

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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