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Aleks [24]
3 years ago
10

What’s the answer to this

Mathematics
1 answer:
ryzh [129]3 years ago
7 0

Answer:

  see below

Step-by-step explanation:

The graph extends to the left more or less horizontally, approaching the line y=3. The only choice that expresses that is the third one.

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12. Using the value of 0.538 for the proportion of those surveyed who said they exercise at least 30 minutes three or more days
ICE Princess25 [194]

Answer:

ME=1.96\sqrt{\frac{0.538 (1-0.538)}{15235}}=0.00792    

The margin of error on this case is approximated \pm 0.792\% who is very clos to the +1% reported by the Gallup.

Step-by-step explanation:

Assuming this previous info : "Results are based on telephone interview conducted as part of the Gallup-Healthways Well-Being Index survey June 1–30,2013, with a random sample of 15,235 adults, aged 18 and older, living in all 50 U.S. states and the District of Columbia.

For results based on the total sample of national adults, one can say with 95% confidence that the maximum margin of sampling error is ±1 percentage point."

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".  

The population proportion have the following distribution

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

Solution to the problem

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 estimated proportion on this case is \hat p =0.538 and n =15235, the margin of error is given by:

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

And if we replace we got:

ME=1.96\sqrt{\frac{0.538 (1-0.538)}{15235}}=0.00792    

The margin of error on this case is approximated \pm 0.792\% who is very clos to the +1% reported by the Gallup.

5 0
2 years ago
Which expression and diagram represent “Renee biked four times as far this month as last month”? 4 x right-arrow 4 boxes with x
ANTONII [103]

Answer:

i think it is c or d

Step-by-step explanation:

4 0
3 years ago
Someone help with this midpoint question please
Natali5045456 [20]

Answer: D) (2,0)

Step-by-step explanation:

These are your values.

(-2,4);(6,-4)

Remember this means;

(x_1,y_1);(x_2,y_2)

The formula for finding the midpoint of a segment is simple. Add both x's and y's and divide them by 2 separately. Or, if you like to follow formulas, here you go.

Let M be midpoint.

M=\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}

M=\frac{-2+6}{2},\frac{4+(-4)}{2}

M=\frac{4}{2} ,\frac{4-4}{2}

M=\frac{4}{2} ,\frac{0}{2}

M=2,0

3 0
2 years ago
Much love if u answer <3 <3"▵EHG ≅ ▵KFC; Which is a true statement?
ipn [44]
ANSWER:- C. EG = KC

EXPLANATION:-
EH = KF
HG = FC
EG = KC
E=K
H=F
G=C

6 0
2 years ago
Which equation represents a line with a slope of -6/5<br> and a y-intercept of 1?
Crazy boy [7]

Answer:

y = -6/5x + 1

Step-by-step explanation:

3 0
3 years ago
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