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irakobra [83]
2 years ago
5

A political party wishes to estimate the proportion of voters that support the party in a particular state. The party will poll

a random sample of n voters from the state. Which of the following is likely to result in the largest margin of error?
a. n = 500, confidence level 95%
b. n = 500, confidence level = 99%
c. n = 500, confidence level = 90%
d. n= 300, confidence level 95%
e. n = 300, confidence level = 90%
Mathematics
1 answer:
kap26 [50]2 years ago
7 0

Answer:

Option D

Step-by-step explanation:

Generally the equation for Margin of Error is mathematically given by

M.E=Z*sqrt{\frac{p*(1-p)}{n}}

Condition for Largest M.E

n has to be smallest and Z value has to be largest.

Where

From options

Smallest n=300

Largest Z value respects to \alpha=95\%

Therefore

n= 300, confidence level 95%

Option D

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3 years ago
Built around 2600 BCE, the Great Pyramid of Giza in Egypt is 485 ft high (due to erosion, its current height is slightly less) a
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Answer:1.69*10^12 J

Step-by-step explanation:

From figure above, using triangle ratio

485/755.5=y/l. Cross multiplying 485l=755.5y Divide via 485) hence l= 755.5y/485

Consider a slice volume Vslice= (755.5y/485)^2∆y; recall density =150lb/ft^3

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From figure 2 in the attachment work done for elementary sclice

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To calculate the total work we integrate from y=0 to y= 485

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Integrating the above

W= 150*755.5^2/485[485*y^3/3-y^4/4] at y= 0 and y=485

W= 150*755.5^2/485(485*485^3/3-484^4/4)-(485.0^3/3-0^4/4)

Work done 1.69*10^12joules

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