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mylen [45]
3 years ago
11

Enter the value of b when the expression 14.1x - b is equivalent 4.7(3x-3.5)?

Mathematics
1 answer:
3241004551 [841]3 years ago
4 0

Answer:

I believe it is: B= 16.45

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Consider a left-tailed test, where the p-value is found to be 0.10. If the sample size n for this test is 49, then the t statist
tigry1 [53]

Answer:

df=n-1=49-1=48  

We know that the p value is 0.1, and since is a left tailed test would be given by:

p_v = P(t_{48} < t_{calculated})=0.1

And we can find the calculated value using excel or the t table.

If we use the following excel code we got: "=T.INV(0.1,48)"

And the calculated value is t_{calculated}=-1.29944

Step-by-step explanation:

State the null and alternative hypotheses to be tested  

We need to conduct a hypothesis in order to determine if the true mean is lower than specified valu \mu_o, the system of hypothesis would be:  

Null hypothesis:\mu \geq \mu_o  

Alternative hypothesis:\mu < \mu_o  

Compute the test statistic  

We don't know the population deviation, so for this case is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}} (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

We can find the degrees of freedom for this test given by:

df=n-1=49-1=48  

We know that the p value is 0.1, and since is a left tailed test would be given by:

p_v = P(t_{48} < t_{calculated})=0.1

And we can find the calculated value using excel or the t table.

If we use the following excel code we got: "=T.INV(0.1,48)"

And the calculated value is t_{calculated}=-1.29944

3 0
3 years ago
The isosceles triangle has a perimeter of 7.5 m. Which equation can be used to find the value of x if the shortest side
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Answer:

<u>(7.5-2.1) /2</u>

<u>If the shortest side measures 2.1 m</u>.

<em>7.5-2.1 =5.4.</em> Then divide by 2 each side is 2.7m

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3 years ago
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5 because $3.95 divided by 0.79 equals 5
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On 7 jobs, a welder charges 3.5 hours, 9.5 hours, 4 hours, 5.5 hours, 12 hours, 8.5 hours, and 6 hours. Find the average hours b
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All you need to do is add all 7 job hours, and divide the total by 7. Your answer should be 7
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3 years ago
Which of the above polynomials is a 5th degree trinomial?
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5th degree means highest power is 5 so must have x^5

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