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3 years ago

I need help pweeeessss

Mathematics

1 answer:

yulyashka [42]3 years ago

5 0

4. x = 1/2 and y = 3

5. x = −5/7 and y = 16/7

6. No solutions.

7. x = 7 and y = 4

8. ( You already got that one but just in case ) No solutions.

9. x = 3/2 and y = 3

10. x = 1/5 and y = 0

11. x = 3 and y = −8/5

12. x = −48 and y = −45

13. x = 92/15 and y = 29/15

14. x = −38/3 and y = 21

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Which expression should you simplify to find the 90% confidence interval,

bogdanovich [222]

Answer:

$0.45 - 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.2870.45 + 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.613$

we can conclude at 95% of confidence that the true proportion of interest for this case is between 0.287 and 0.613

Step-by-step explanation:

The estimated proportion of interest is $\hat p=0.45$

We need to find a critical value for the confidence interval using the normla standard distributon. For this case we have 95% of confidence, then the significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ .

And the critical value is: $z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96$

The confidence interval for the true population proportion is interest is given by this formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

Replacing the values provided we got:

$0.45 - 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.287\\\\0.45 + 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.613$

And we can conclude at 95% of confidence that the true proportion of interest for this case is between 0.287 and 0.613

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3 years ago

After knee surgery, your trainer tells you to return to your jogging program slowly. He suggests jogging for 12 minutes each day

frozen [14]

I know you can create an equation to solve this but its been a while since ive done this so im going to slowly write it out.
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2=18
3=24
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3 years ago

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Vikki [24]

Answer:

i think its twelve nine and five

Step-by-step explanation:

not one hundred percent sure

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