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makvit [3.9K]
3 years ago
15

Anyone can help me out on this? :)

Mathematics
1 answer:
Charra [1.4K]3 years ago
6 0

Answer:

the answer is c, science CANNOT answer all questions

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A polling agency is investigating the voter support for a ballot measure in an upcoming city election. The agency will select a
Setler79 [48]

Answer:

The value is  P( X  >  0.50) = 0.089264

Step-by-step explanation:

From the question we are told that

   The sample size is  n =  500

   The  population proportion is  p =  0.47  

     

Generally given that the sample size is sufficiently large , the mean of this sampling distribution is mathematically represented as

        \mu_x  =  p  =  0.47

Generally the standard deviation of the sampling distribution is mathematically represented as

       \sigma  =  \sqrt{\frac{p(1- p )}{ n} }

=>     \sigma  =  \sqrt{\frac{ 0.47 (1-0.47  )}{ 500 } }

=>     \sigma  = 0.0223

Gnerally the probability that the proportion of voters in the sample of Region A who support the ballot measure is greater than 0.50 is mathematically represented as

          P( X  >  0.50) =  P( \frac{ X - \mu  }{ \sigma }  >  \frac{ 0.50 - 0.47 }{ 0.0223 } )

\frac{X -\mu}{\sigma }  =  Z (The  \ standardized \  value\  of  \ X )

=>        P( X  >  0.50) =  P( Z> 1.3453  )

From the z table  the area under the normal curve to the left corresponding to  1.3453   is

          P( Z> 1.3453  ) =  0.089264

So  

          P( X  >  0.50) = 0.089264

8 0
3 years ago
An event manager recorded the number of people in different age groups who attended a music concert:
Vesnalui [34]

Answer:

Age Group Number of People 18–24 80 25–31 120 32–38 40 39–45 20

The data in each bar is how many people in that group.

So 18-24 has 80 people

25-31 has 120 people

32 -38 has 40 people

39-45 has 20 people

Step-by-step explanation:

3 0
2 years ago
A bag contains 7 red, 4 blue, and 6 white marbles.
Leno4ka [110]

Answer:

28/289

Step-by-step explanation:

7 red, 4 blue, and 6 white  = 17 marbles

P ( red ) = number of red / total

             = 7/17

Replace the marble

7 red, 4 blue, and 6 white  = 17 marbles

P ( blue ) = number of blue / total

             = 4/17

P (red, replace, blue) = 7/17* 4/17

                                    =28/289

4 0
2 years ago
W-4=-12-3w solve for w
lyudmila [28]

w-4=-12-3w

Add 12 to each side:

w + 8 = -3w

Subtract 1w from each side:

8 = -4w

Divide both sides by -4:

w = 8 / -4

w = -2

5 0
3 years ago
Plz help me my maths hw is due in a couple of hrs!!!
Hatshy [7]
The answers are in the picture
Have agreat day

7 0
2 years ago
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