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3 years ago

2 times 4 squared................

Mathematics

2 answers:

Fynjy0 [20]3 years ago

6 0

The answer is -------32------------ ok

Nady [450]3 years ago

6 0

It equals 32.
4^2=16
16 times 2 is 32.

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A researcher wishes to estimate, with 99% confidence, the population proportion of adults who think the president of their co

scoray [572]

Answer:

a. n=4148

b. n=3909

c. The sample size is smaller if a known proportion from prior study is used. The difference in sample sizes is 239

Step-by-step explanation:

a. For sample where no preliminary estimate is given, the minimum sample size is calculated using the formula:

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

Where:

$ME=$ Margin of error
$p=$ is the assumed proportion

#Let p=0.5, substitute in the formula to solve for n:

$n=0.5(1-0.5)\times (2.576/0.02)^2\\\\=4147.36\approx 4148$

Hence, the minimum sample size is 4148

b. If given a preliminary estimate p=0.38, we use the same formula but substitute p with the given value:

$n=p(1-p)(z/ME)^2\\\\=0.38(1-0.38)(2.576/0.02)^2\\\\=3908.47\approx3909$

Hence, the minimum sample size is 3909

c. Comparing the sample sizes from a and b:

$n_{0.5}>n_{0.38}\\\\n_{0.5}-n_{0.38}=4148-3909=239$

Hence, the actual sample size is smaller for a known proportion from prior a prior study.

8 0

3 years ago

<img src="https://tex.z-dn.net/?f=7%20%5Cfrac%7B2%7D%7B3%7D%20%20" id="TexFormula1" title="7 \frac{2}{3} " alt="7 \frac{2}{3}

sammy [17]

Answer:

$7 \frac{2}{3}=\frac{7*3+2}{3}=\frac{23}{3}$

$7 \: \frac{1}{2}=\frac{7*2+1}{2}=\frac{15}{2}$

$5842 \div 23=254$

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3 years ago

Why is it a good idea to check to see if your answer is reasonable?

babymother [125]

It is a good idea to check to see if your answer is reasonable because a. if your answer is reasonable, you have probably done the problem correctly.

6 0

3 years ago

Read 2 more answers

35 POINTS PLS HELP I HAVE UNTIL 12 TO FINISH

evablogger [386]

Answer: The first one is = 27.5

1/3 * 25 * 3.3 = 27.5

4 0

3 years ago

What is the volume of this pyramid? • 7560 cm³ • 5040 cm³ • 2520 cm³ • 1728 cm³

gavmur [86]

Answer:

Volume = 2520 cm^3.

Step-by-step explanation:

The volume of a pyramid = 1/3 * area of the base * height.

The base of this pyramid is a triangle and its area

= 1/2 * 18 * 24 cm^2 so the volume of the pyramid is:

1/3 * 1/2 * 18 * 24 * 35

= 2520 cm^3.

6 0

3 years ago