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uysha [10]
3 years ago
5

What is f(3)? –9 –1 1 9

Mathematics
2 answers:
nydimaria [60]3 years ago
5 0
<h2>It's the last answer, or 9. </h2>

<em>Explanation - </em>Questions that tell you to find F(X) want you to go on the X column, not the column that says F(X.)

Now it says to find F(3), so go down the X column until you find 3. The number to the right of 3 is 9, so your answer must be 9.  

Pavlova-9 [17]3 years ago
4 0
The second because that the correct answer
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Answer:

1. m=- -1 2. -1+1

Step-by-step explanation:

Ok for the first one you need to label 3 x1 0 y1 6 x2

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Next you need to do y2-y1 over x2-x1 so fill that in and your equasion is (-3-0)

------------ = -3

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3

That reduces to -1 because -3 divided by 3 is -1

As for number 2 we need to find b to do this pick any of the y's from before we can go with 0 so the 0 is y in the equasion and we already learned slope is -1 so your equasion should be 0=--1+b ok to solve this you need to add -1 to both sides since its a negitive so you add 1 to 0 which is 1 and when you add 1 to -1 it cancells it out so you have 1=b so b is 1 for the equsion you just fill it in so it is y=- -1+1

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3 years ago
Which numbers will round to 19 when they are rounded to the nearest whole number?
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Someone claims that the average amount of time that a freshman at TAMU studies is 7 hours. We think it’s higher than that and de
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Answer:

Test statistic t = 5.25

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Step-by-step explanation:

This is a hypothesis test for the population mean.

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H_0: \mu=7\\\\H_a:\mu> 7

The significance level is 0.05.

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The sample mean is M=8.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=√s^2=√4=2.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{2}{\sqrt{49}}=0.29

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{8.5-7}{0.29}=\dfrac{1.5}{0.29}=5.25

The degrees of freedom for this sample size are:

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As the P-value (0.000002) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the average amount of time that a freshman at TAMU studies is significantly higher than 7 hours.

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