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3 years ago

Please help 25v^2-20vx+4x^2

1 answer:

7 0

$25v^2-20vx+4x^2 \\ \\ (5v)^2 - 2(5v)(2x) + (2x)^2 \\ \\ (5v - 2x)^2 \\ \\$

The final result is: (5v - 2x)²

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A professor thinks that the students in her statistics class this term are less creative than most students at this university.

choli [55]

Answer:

It is not enough evidence to reject null hypothesis. It is not enough evidence to say that mean score is not equal to 35.

Step-by-step explanation:

$\mu=35\\n=23\\\=x=33\\s=5\\\alpha=0.1$

1. Null and alternative hypothesis

$H_{0}:\mu=35\\H_{1}:\mu$

2. Significance level

$\alpha=0.1\\1-\alpha=0.99$

Freedom degrees is given by:

$v=n-1\\v=23-1=22$

For a sgnificance level of 0,01 and 22 freedom degrees, t-student distribution value is:

$t_{0.01;23}=-2. 5083$

3. Test statistic

$t=\frac{\=x-\mu}{\frac{s}{\sqrt{n} } }$

$t=\frac{33-35}{\frac{5}{\sqrt{23} } }$

$t=-1,918$

In this case, we have an one left tailed analysis, it means that null hypothesis is rejected if $t$

$-1.918>-2.5083$

Conclusion:

It is not enough evidence to reject null hypothesis. It is not enough evidence to say that mean score is not equal to 35.

3 0

3 years ago

Simplify:

wlad13 [49]

Answer:

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Step-by-step explanation:

i use a very good app to find the answer

8 0

3 years ago

What is the inequality? A. x < 2 B. x ≤ 2 C. y ≥ 2 D. x > 2

Lera25 [3.4K]

the answer of this inequality is

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3 years ago

Help me! :( will appreciate any type of help

KengaRu [80]

Answer:32

Step-by-step explanation: (2+3x)= 98 then solve

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2 years ago

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7 0

3 years ago

Read 2 more answers