First choose which of the following statements are correct. If there is more than one reason why the system is not in echelon fo
rm, type the letters as a comma separated list. If the system is in echelon form, make sure to type D as your answer. A. The system is not in echelon form because a variable is the leading variable of two or more equations. B. The system is not in echelon form because the system is not organized in a descending "stair step" pattern so that the index of the leading variables increases from the top to bottom. C. The system is not in echelon form because not every equation has a leading variable. D. The system is in echelon form.
1 answer:
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Answer:
Test statistic
<em> Z = 2.820 > 1.96 at 0.05 level of significance</em>
<em>Null hypothesis is rejected at 0.05 level of significance</em>
<em>The average salary is actually higher than the reported the average of American Medical Association</em>
<u>Step-by-step explanation:</u>
<u><em>Step(i)</em></u>:-
Given data
sample size 'n' = 64
mean of the Population( μ) = $189,121
Standard deviation of the Population(σ) = $26,975
Mean of the sample (x⁻) = $198,630
<u><em>Step(ii):</em></u>-
<u><em>Null hypothesis : H₀ </em></u><em>: there is no significance difference between the means</em>
<u><em>Alternative Hypothesis :H₁</em></u> : <em>The average salary is actually higher than the reported the average of American Medical Association</em>
<em>Test statistic </em>
<em> </em><em></em>
<em> </em><em></em>
<em> Z = 2.820</em>
<em>Level of significance </em>
<em> ∝ =0.05</em>
<em> </em>
<u><em>Final answer</em></u><em>:-</em>
<em> Z = 2.820 > 1.96 at 0.05 level of significance</em>
<em>Null hypothesis is rejected at 0.05 level of significance</em>
<em>The average salary is actually higher than the reported the average of American Medical Association</em>
<em> </em>
<em></em>
<em></em>