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nevsk [136]
3 years ago
8

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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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

8 0
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?<br><br> • 7560 cm³<br> • 5040 cm³<br> • 2520 cm³<br> • 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
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