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3 years ago

12

What are the two major theories of how Native American arrived in the Western Hemisphere? Which is the most popular and also exp

lain the largest number of migrants?

1 answer:

Virty [35]3 years ago

4 0

The land bridge (Bering strait) and the crossing from Canada

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7 meters/20 minutes= x cm/2 hours

meriva

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3 years ago

I NEED HELP PLEASE HELP

Luda [366]

Answer:

what is the quistion

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nignag [31]

Answer:

im gussing sorry if its wrong :(

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3 years ago

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3x +6= 27<br> x =<br> how do you solve this.

Serjik [45]

3x + 6 = 27

step 1. subtract 6 from both sides

3x = 21

step 2. divide both sides by three to get x alone

x = 7

hope this helps

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3 years ago

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Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.02 margin of er

Brrunno [24]

Answer: 2172

Step-by-step explanation:

Formula to find the sample size n , if the prior estimate of the population proportion(p) is known:

$n= p(1-p)(\dfrac{z^*}{E})^2$ , where E= margin of error and z* = Critical z-value.

Let p be the population proportion of adults have consulted fortune tellers.

As per given , we have

p= 0.20

E= 0.02

From z-table , the z-value corresponding to 98% confidence interval = z*=2.33

Then, the required sample size will be :

$n= 0.20(1-0.20)(\dfrac{2.33}{0.02})^2$

$n= 0.20(0.80)(116.5)^2$

$n= 2171.56\approx2172$

Hence, the required sample size = 2172

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3 years ago