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Ann [662]
2 years ago
11

Help me the question 1 in my picture

Mathematics
1 answer:
Effectus [21]2 years ago
6 0

Answer:

Number 1 is b

I found the answer on a website

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Based on information from Harper’s Index, 37% of adult Americans believe in Extraterrestrials. Out of a random sample of 100 adu
san4es73 [151]

Answer:

z(s)  is in the rejection zone , therefore we reject H₀

We have enough evidence to claim the proportion of individuals who attended college and believe in extraterrestrials is bigger than 37%

Step-by-step explanation:

We have a prortion test.

P₀  =  37 %         P₀  = 0,37

sample size  =  n  =  100

P sample proportion   =   P  = 47 %        P  =  0,47

confidence interval  95 %

α  =   0,05  

One tail-test  (right tail) our case is to show if sample give enough information to determine if proportion of individual who attended college is higher than the proportion found by Harper´s index.

1.-Hypothesis:

H₀      null hypothesis                        P₀  =  0,37

Hₐ  alternative hypothesis                P₀  >  0,37

2.-Confidence interval 95 %

α  =   0,05        and    z(c)  =  1.64

3.-Compute of z(s)

z(s)  =  [  P  -  P₀  ]  /√(P₀Q₀/n) ]  

z(s)  =  [ (  0,47  -  0,37  ) /  √0.37*0,63/100

z(s)  = 0,1 /√0,2331/100     ⇒   z(s)  = 0,1 /0,048

z(s)  = 2.08

4.-Compare  z(s)   and  z(c)

z(s) > z(c)        2.08  > 1.64

5.-Decision:

z(s)  is in the rejection zone , therefore we reject H₀

We have enough evidence to claim the proportion of individuals who attended college and believe in extraterrestrials is bigger than 37%

5 0
3 years ago
If i had 12$ but I spent 2 how much would I have left​
Ad libitum [116K]

The answer for this question would be 10

5 0
3 years ago
Read 2 more answers
Which number is irrational?<br> A) 16.5% <br> B) 0.0675 <br> C) 8 3/4 <br> D) π
____ [38]
A is irrational !!!!!!!!!
6 0
3 years ago
Read 2 more answers
BRAINLIEST+ STARS!!
nasty-shy [4]

<u>To find the density:</u>

 ⇒ must find the relationship between the density, mass, and volume

    ⇒ Density = \frac{mass}{volume}

<u>Let's examine the information given:</u>

  • weight: 1890g
  • dimensions: 8cm * 5cm* 5cm

<u>Let's first find the volume:</u>

   ⇒ the volume is the dimensions multiplied together

      Volume = 8cm * 5cm * 5cm = 200cm^3

<u>LEt's calculate the density now:</u>

  Density = \frac{1890g}{200cm^3} =9.45g/cm^3

<u>Answer:</u> The density of the copper is <u>9.45g/cm^3</u> or <u>Choice (A)</u>

<u></u>

Hope that helps!

6 0
2 years ago
NO LINKS OR ANSWERING WHAT YOU DON'T KNOW?
Rom4ik [11]

Answer:

4,a

5.d

6.c

plz mark me as brainliest

Step-by-step explanation:

6 0
2 years ago
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