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ira [324]
3 years ago
10

The actual proportion of voters who plan to vote for a particular proposition in the next election is 70%, but LaShandra does no

t know this. LaShandra has been hired by the election campaign to conduct a sample survey to estimate the proportion of voters who will vote for the proposition. LaShandra decides to take a random sample of size 121 from all eligible voters. 31. Draw a picture of the sampling distribution of p-hat. Give a mathematical expression for the mean of your distribution as well as the number. Also label the x-axis on your picture. Upload a photo or scan of your picture, or else create an electronic file and upload the file.

Mathematics
1 answer:
Setler [38]3 years ago
4 0

Answer:

0.0417

Step-by-step explanation:

Given the following;

p = 0.7, n=121

The sampling distribution of sample proportion will be approximately normal with mean

\mu_{\hat{p}}=p=0.7

and standard deviation

\sigma_{\hat{p}}=\sqrt{\frac{p(1-p)}{n}}=\sqrt{\frac{0.7\cdot 0.2}{121}}=0.0417

Check attachment for the curve diagram.

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In two or more complete sentences describe how to determine the appropriate model for the set of data, (0,2), (2,3), (5,4), (10,
hjlf
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Once you plot the data points, make a trendline. You are given with options. If you want a linear function, then you will have a linear model with a function equation of y = 0.2907x + 2.2643. It has a correlation coefficient of 0.9595. That's a strong correlation already. The R² value tells how good your model fits the data points. If you want to increase the R², a better model would be a quadratic function with the equation, y = -0.0209x²+0.506x+2.0232. As you can see the R² increase even more to 0.9992.

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3 years ago
What is the 8th term of the geometric sequence with this explicit formula ?
Alina [70]

Answer: C.) - 896

Step-by-step explanation:

Given the explicit formula :

An = 7 × (-2)^(n-1)

The 8th term of the geometric sequence using the formula will be :

n = 8

A8 = 7 × (-2)^(8-1)

A8 = 7 × (-2)^7

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7 0
3 years ago
Of 140 seventh grade students, 15% earn the presidential physical Fitness award. How many students earn the award
Makovka662 [10]
To find this answer you need to multiply the percent by the total, in this case 15% times 140. Remember to change the percent into a decimal (0.15). 

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21 people earned the award
3 0
3 years ago
Read 2 more answers
Can someone help me with these similar triangles quiz asap?
fredd [130]

Answer:

4. D

11. B

12. C

16. D

17. A

Step-by-step explanation:

6 0
3 years ago
If $4000 is borrowed at a rate of 16% interest
Gemiola [76]

Answer:

(a) $7492

(b) $10,253

(c) $14,032

Step-by-step explanation:

As we know, the final Amount can be calculated with the formula for compound interest,

A = P(1 + \frac{r}{n} )^{nt}

where,

A = Final Amount due

P = Initial principal amount borrowed

r = rate of interest in decimal

n = number of times applied per time period

t = total time period

Now, according to the given data,

(a) in 4 years ;-

⇒ A = 4000(1 + \frac{0.16}{4} )^{4(4)}

⇒ A = 7492

(b) in 6 years ;-

⇒ A = 4000(1 + \frac{0.16}{4} )^{4(6)}

⇒ A = 10,253

(c) in 8 years ;-

⇒ A = 4000(1 + \frac{0.16}{4} )^{4(8)}

⇒ A = 14,032

6 0
3 years ago
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