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3 years ago

True or false To increase the size os an drawing we multiply the side lengths by a fraction

Mathematics

1 answer:

Aliun [14]3 years ago

5 0

Answer:

true im not sure

Step-by-step explanation:

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A researcher wishes to estimate, with 9090% confidence, the proportion of adults who have high-speed Internet access. Her es

Sunny_sXe [5.5K]

Answer: a) Required minimum sample size= 219

b) Required minimum sample size= 271

Step-by-step explanation:

As per given , we have

Margin of error : E= 5% =0.05

Critical z-value for 90% confidence interval : $z_{\alpha/2}=1.645$

a) Prior estimate of true proportion: p=28%=0.28

Formula to find the sample size :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.28(1-0.28)(\dfrac{1.645}{0.05})^2\\\\=218.213856\approx219$

Required minimum sample size= 219

b) If no estimate of true proportion is given , then we assume p= 0.5

Formula to find the sample size :-

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2\\\\=0.25(\dfrac{1.645}{0.05})^2\\\\=270.6025\approx271$

Required minimum sample size= 271

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2 years ago

Jamie has 6 coins. Each coin is either a penny or a nickel. How much money does Jamie have?

seraphim [82]

He would have 6-30 cents

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2 years ago

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Plssss help (ALGEBRA 1 ) will mark brainlest

Dimas [21]

Answer:

I'm confused by the layout of the first two, but I can help you with the last one!

The last one is C!

Step-by-step explanation:

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2 years ago

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Simplify the expression: Show your work. Write the answer in standard form (15 +6d - d²) + (-5d² - 18 + 6d) PLEASE HELP

mezya [45]

Answer:

-6d^2 + 12d - 3

Step-by-step explanation:

use PEMDAS

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use that order to solve problems like that.

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2 years ago

The school auditorium has 80 rows of seats. There are 50 seats in each row. What is the total number of seats in the chhool audi

Snezhnost [94]

The number of rows = 80

number of seats in 1 row = 50

total number of seats is the product of the number of rows and number of seats per row = 80*50 = 4000

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2 years ago

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True or false To increase the size os an drawing we multiply the side lengths by a fraction​

True or false To increase the size os an drawing we multiply the side lengths by a fraction