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Klio2033 [76]
2 years ago
5

CN someone help me with this

Mathematics
1 answer:
Rasek [7]2 years ago
3 0
First .58 then 1.98 3rd 7.53 lastly 14.7
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A company has developed a training procedure to improve scores on the SAT. Following the training, 100 high school students take
Pani-rosa [81]

Answer:

The calculated t-test = 1.717 < 1.6604 at 0.05 level of significance

Null hypothesis is accepted at 0.05 level of significance

A company has developed a training procedure is significantly improve scores

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given  sample mean (x⁻ )  = 517

sample standard deviation (s) =90

Mean of the Population (μ) =500

<em>Null Hypothesis :- H₀ :  </em> (μ) =500

Alternative Hypothesis : H₁ :  μ ≠ 500

<u><em>Step(ii)</em></u>:-

Test statistic

                         t = \frac{x^{-} -mean}{\frac{s}{\sqrt{n} } }

                        t = \frac{517 -500}{\frac{90}{\sqrt{100} } }

                        t  =   1.717

<em>Level of significance</em>

                      ∝ = 0.05

                    t₀.₀₅ = 1.6604

The calculated t-test = 1.717 < 1.6604 at 0.05 level of significance

<u><em>Conclusion</em></u>:-

Null hypothesis is accepted at 0.05 level of significance

A company has developed a training procedure is significantly improve scores

3 0
3 years ago
At what point of the curve y = cosh(x does the tangent have slope 2?
Dahasolnce [82]
The hyperbolic cos (cosh) is given by
cosh (x) = (e^x + e^-x) / 2
The slope of a tangent line to a function at a point is given by the derivative of that function at that point.
d/dx [cosh(x)] = d/dx[(e^x + e^-x) / 2] = (e^x - e^-x) / 2 = sinh(x)
Given that the slope is 2, thus
sinh(x) = 2
x = sinh^-1 (2) = 1.444

Therefore, the curve of y = cosh(x) has a slope of 2 at point x = 1.44
5 0
2 years ago
What is 8(7x-2)-x=424 ?
valina [46]
X=8 i did mental math but 56x-16-x=424
                                            +16      +16
                                              55x=440
                                               /55  /55
                                                x=8
3 0
3 years ago
What would it cost to carpet a rectangular floor measuring 18 feet by 24 feet if the carpet costs $17.10 per square yard
cestrela7 [59]
It would cost $7387.20 for the entire rectangular floor. Hope this answers your question. :)
5 0
3 years ago
Solve:<br> y" + 14y' + 49y = 8xe^-7x
erma4kov [3.2K]
The answer is 7x^2e-/8

8 0
2 years ago
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