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3 years ago

11

Mack says he typically spends 4 hours per week practicing his piano. For the past 6 weeks, he has practiced for 1, 1, 1, 2, 10,

and 9 hours. Do you agree with Mack? Explain.

1 answer:

WITCHER [35]3 years ago

4 0

Answer:

yes

Step-by-step explanation:

1+1+1+2+10+9=24 even though he did not do the same amount of hours each week he did complete 24 hours in six weeks and 6×4=24

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Answer:

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Step-by-step explanation:

We can assume that the force that the catapult does is always the same.

So, here we need to remember Newton's second law:

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So, we can rewrite:

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In a simple regression analysis for a given data set, if the null hypothesis β = 0 is rejected, then the null hypothesis ρ = 0 i

kati45 [8]

Answer:

Null hypothesis: $\rho =0$

Alternative hypothesis: $\rho \neq 0$

The statistic to check the hypothesis is given by:

$t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}$

And is distributed with n-2 degrees of freedom

And the statistic to check the significance of a coeffcient in a regression is given by:

$t_1 = \frac{\hat{\beta_1} -0}{S.E (\hat{\beta_1})}$

For this case is importantto remember that t1 and p value for test of slope coefficient is the same test statistic and p value for the correlation test so then the answer would be:

Always

Step-by-step explanation:

In order to test the hypothesis if the correlation coefficient it's significant we have the following hypothesis:

Null hypothesis: $\rho =0$

Alternative hypothesis: $\rho \neq 0$

The statistic to check the hypothesis is given by:

$t=\frac{r \sqrt{n-2}}{\sqrt{1-r^2}}$

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Always

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Step-by-step explanation:

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