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Snezhnost [94]
3 years ago
10

I only need help with number 7

Mathematics
1 answer:
Reil [10]3 years ago
3 0

a,c,d are all correct

You might be interested in
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

5 0
3 years ago
Plz help and thank you
Nastasia [14]

Answer:

60%

Also known as 330 students

Step-by-step explanation:

Plz mark brainliest!!!

6 0
3 years ago
Read 2 more answers
8xy − 9x2 y − 5x + 6
givi [52]

Answer:

DOnt know

Step-by-step explanation:

dont know

4 0
2 years ago
Read 2 more answers
Help ME fast and pls
iogann1982 [59]

Answer:

the first one is 8 and 9

the second one is 13 and 14

Step-by-step explanation:

8^2 is equal to the square root of 64 and 9^2 is equal to the square root of 81.

13^2 is equal to the square root of 169 and 14^2 is equal to the square root of 196.

hope this helps and is correct.

5 0
3 years ago
M and m<br> Please find quick
Lady_Fox [76]

Answer:

wELL YOU WANT TO GRAB SOME M AND MS AND EAT THEM

Step-by-step explanation:

4 0
2 years ago
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