Mean entry-level salaries for college graduates with mechanical engineering degrees and electrical degrees are believed to be approximately the same. A recruiting office thinks that the mean mechanical engineering salary is actually lower than the mean electrical engineering salary. The recruiting office randomly surveys 50 entry level mechanical engineers and 60 entry level electrical engineers. Their mean salaries were $46,700, respectively. Their standard deviations were $3,450 and $4,210, respectively. At the 5% significance level, conduct a hypothesis test to determine if you agree that the mean entry-level mechanical engineering salary is lower than the mean entry-level electrical engineering salary. Subscripts: 1: mechanical; 2: electrical What is the question/claim to be tested in symbols the hypothesis is Ho: Ha: which hypothesis matches the claim test objective is to reject or support level of significance a=.05 type of test (left, right, two-tailed) the applicable test to be applied is (2-sampZTEST/2-sampTTEST, 2-propZTEST) calculate the applicable test to be applied is (2-sampZTEST/2-sampTTEST, 2-propZTEST) calculate the applicable test statistic z or t= p-value= compare p-value to a (eg. p-value greater than or less than a) decision (reject Ho/Failed to reject) evidence (enough/not enough) test objective is to (reject/support): conclusion: at __ level of significance, _ ___ that the mean entry-level salaries of mechanical engineers is lower than that of electrical engineers

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Description: Mean entry-level salaries for college graduates with mechanical engineering degrees and electrical degrees are believed to be approximately the same. A recruiting office thinks that the mean mechanical engineering salary is actually lower than the me

MATLAB: An Introduction with Applications

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ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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Mean entry-level salaries for college graduates with mechanical engineering degrees and electrical degrees are believed to be approximately the same. A recruiting office thinks that the mean mechanical engineering salary is actually lower than the mean electrical engineering salary. The recruiting office randomly surveys 50 entry level mechanical engineers and 60 entry level electrical engineers. Their mean salaries were $46,700, respectively. Their standard deviations were $3,450 and $4,210, respectively. At the 5% significance level, conduct a hypothesis test to determine if you agree that the mean entry-level mechanical engineering salary is lower than the mean entry-level electrical engineering salary.
Subscripts: 1: mechanical; 2: electrical

What is the question/claim to be tested in symbols

the hypothesis is

Ho:

Ha:

which hypothesis matches the claim

test objective is to reject or support

level of significance a=.05

type of test (left, right, two-tailed)

the applicable test to be applied is (2-sampZTEST/2-sampTTEST, 2-propZTEST)

calculate the applicable test to be applied is (2-sampZTEST/2-sampTTEST, 2-propZTEST)

calculate the applicable test statistic
z or t=

p-value=

compare p-value to a (eg. p-value greater than or less than a)

decision (reject Ho/Failed to reject)

evidence (enough/not enough)

test objective is to (reject/support):

conclusion:

at ____ level of significance, _____ _____ that the mean entry-level salaries of mechanical engineers is lower than that of electrical engineers

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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