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Zigmanuir [339]
2 years ago
13

Plz guyss helpp;( The question is above

Mathematics
1 answer:
IceJOKER [234]2 years ago
7 0

Answer:

40

Step-by-step explanation:

The frequency column gives the number of houses in the sample, then

number of houses = 5 + 11 + 23 + 1 = 40

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Solve the inequality.<br><br> p + 14 ≥ 2
diamong [38]

Answer:

p ≥ -12

Step-by-step explanation:

Original Equation:

p + 14 ≥ 2

Subtract 14 from both sides

p ≥ -12

Hope this helps :)

Please consider Brainliest :)

6 0
3 years ago
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Solve for z.<br><br> 3 + 9z = –7 + 10z<br><br> z =
stiv31 [10]
The answer should be z = 10
6 0
2 years ago
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In a survey, the planning value for the population proportion is . How large a sample should be taken to provide a confidence in
tatuchka [14]

Answer:

n=350

Step-by-step explanation:

Notation and definitions

n random sample taken  (variable of interest)

\hat p=0.35 estimated proportion  (value assumed)

p true population proportion

Confidence =0.95 or 95% (value assumed)

Me=0.05 (value assumed)

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".  

The population proportion have the following distribution

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

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The margin of error for the proportion interval is given by this formula:  

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

And on this case we have that ME =\pm 0.05 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.35(1-0.35)}{(\frac{0.05}{1.96})^2}=349.586  

And rounded up we have that n=350

4 0
2 years ago
1. An AP Statistics class starts a project to estimate the average number of hours a student at their high school sleeps per nig
Vladimir [108]

Answer:

Option E

Step-by-step explanation:

This survey will not be reliable as it is chosen for convenience; the first 120 students to arrive in school on a particular morning and this collection of individuals may not be a representative of the population. The study may become biased because it does not take into account the latecomers among the students which might have been changed the study from systematically favoring certain outcomes.

5 0
3 years ago
Identify the figure that illustrates "A reflection in line k."
dlinn [17]

The 1st figure is correct, the 4th one seems very similar to the 1st one. But the red shape is closer to line k. So the 1st one is correct

8 0
2 years ago
Read 2 more answers
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