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Svetllana [295]
3 years ago
11

Which equation has a constant of proportionality equal to ? 1/2 Choose 1 answer:

Mathematics
1 answer:
katrin [286]3 years ago
7 0

Answer:

C

Step-by-step explanation:

3/6 = 1/2

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A student was asked to find a 90% confidence interval for the proportion of students who take notes using data from a random sam
Scorpion4ik [409]

Answer:

After use the formula we got the following result for the 90% confidence interval (0.13 <p<0.34)

And the conclusion for this case would be:

e. With 90% confidence, the proportion of all students who take notes is between 0.13 and 0.34.

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

Description in words of the parameter p

p represent the real population proportion of students who take notes

\hat p represent the estimated proportion of students who take notes

n is the sample size required  

z_{\alpha/2} represent the critical value for the margin of error  

The population proportion have the following distribution  

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Numerical estimate for p

In order to estimate a proportion we use this formula:

\hat p =\frac{X}{n} where X represent the number of people with a characteristic and n the total sample size selected.

Confidence interval

The confidence interval for a proportion is given by this formula  

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

For the 90% confidence interval the value of \alpha=1-0.90=0.1 and \alpha/2=0.05, with that value we can find the quantile required for the interval in the normal standard distribution.  

z_{\alpha/2}=1.64  

After use the formula we got the following result for the 90% confidence interval (0.13 <p<0.34)

And the conclusion for this case would be:

e. With 90% confidence, the proportion of all students who take notes is between 0.13 and 0.34.

6 0
3 years ago
Which function is used to model hourly pay?
Maksim231197 [3]
Im pretty sure its A, but dont count on me!!! i hope it helps :/
7 0
3 years ago
Read 2 more answers
If a ray divides an angle into two complementary angles, then the original angle is a right angle
lilavasa [31]
No as complementary angles add up to whisk 180 degrees, however supplementary angle would be true for this question
5 0
3 years ago
Read 2 more answers
The price of sneakers reduced $6 per week for 7 weeks. By how much did the price of the sneakers change over 7 weeks?
mylen [45]

Answer:

7(-6)=-42

After 7 weeks the price will be reduced by 7 times $6

Thus the price will be $42

8 0
3 years ago
HELP 7TH GRADE I WILL GIVE BRAINLIEST
Feliz [49]

Answer:

a

Step-by-step explanation:

theres a 90 degree angle and a has a 95 so thats pretty close

5 0
2 years ago
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