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3 years ago

DOUBLE POINTS (Algebra II) please help !!

Mathematics

1 answer:

inna [77]3 years ago

4 0

Answer:

Step-by-step explanation:

Those straight lines that seem as brackets are not brackets...but they are a sign called the modulus,which mean that if the value inside has to be multiplied by a negative...so hence..onto the solution;

| 4(-2) - 8 | + | -1 - (-2)^2 | + 2(-2)^3

; | -8 - 8 | + | -1 -4 | + (-16)

; |-16| + |-5| -16

; 16 + 5 - 16

;Therefore answer, 5

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ololo11 [35]

Answer:

Step-by-step explanation:

$\text{The data given for the quality measurement and other criteria can be seen below:}$

Quality management Excellent Good Fair Total

Excellent 40 25 5 70

Good 35 35 10 80

Fair 25 10 15 50

Total 100 70 30 200

The null and alternative hypothesis:

$\mathbf{H_o: \text{the quality management and reputation are independent} }$

$\mathbf{H_a: \text{the quality management and reputation are not independent} }$

The expected value is calculated by using the formula:

$E=\dfrac{row \ total \times column \ total }{table \ total}$

After using the formula to calculate the table above; we have:

The expected values of the data to be:

Quality management Excellent Good Fair Total

Excellent 35 24.5 10.5 70

Good 40 28 1.2 80

Fair 25 17.5 7.5 50

Total 100 70 30 200

Degree of freedom = ( row - 1 ) × ( column -1 )

$= (3 - 1 ) \times (3 -1)$

$= 2\times 2$

$=4$

$\text{The p-value at level of significance of 0.05 and degree of freedom of 4 = }\mathbf{0.0019}$

Decision rule: To reject the $\mathbf{H_o}$ if the p-value is less than the ∝

Conclusion: We reject the $\mathbf{H_o}$ and conclude that quality management and reputation are not independent.

(B) $\text{The P-value here implies that in case that there is no dependence between the two ratings, }$ $\text{the probability that they will seem to show at least this kind of strong dependence is 0.0019.}$