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ser-zykov [4K]
3 years ago
13

Unaware that 35% of the 10,000 voters in his constituency support him, a politician decides to estimate his political strength.

A sample of 200 voters shows that 40% support him. What is the parameter of interest? State its value
Mathematics
1 answer:
KatRina [158]3 years ago
5 0

Answer.

a. Population is the total number of voters in the constituency, that is 10000

b. the parameter is the unknown character of the population, that is 35% of 10000= 3,500

c. Statistics of interest is know character from the sample, that is 40% of 200= 80

d. The two answers are not surprisingly, because the sample is a portion of the population and we expect it to be smaller that the population. Thus, parameter must be bigger than statistics of interest.

d) ii. If another 200 sample was to be taken, we expect to see an increase in a statistics of interest.

Thus my answer, please help by your approval as fast as you can

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70 decreased by 13% =
Pie
If you have a calculator: 
<span>1) To find 1%, divide by 100 (70 / 100 = 0.7) </span>

<span>2) Then, multiply by the % you need (0.7 x 13 = 9.1) </span>

<span>Therefore 70 - 9.1 = 60.9 </span>

<span>If you don't have a calculator: </span>
<span>1) Find 50%, 10%, 5%, and 1%. With these, you can make any % you need. </span>
<span>50% = X / 2 (= 35) </span>
<span>10% = X / 10 (= 7) </span>
<span>5% = first, do 10%, then divide that by 2 (= 3.5) </span>
<span>1% = X / 100 (= 0.7) </span>
<span>Where X is the number you want to work out % for </span>

<span>2) Add those % up to get the amount you want </span>
<span>10% + 1% + 1% +1% = 13% </span>
<span>7 + 0.7 + 0.7 + 0.7 = 9.1 </span>

<span>Therefore 70 - 9.1 = 60.9
Hope that helps :)</span>
7 0
3 years ago
Kahlia needs $468.75 to buy herself a new chromebook. She plans to wash 125 cars in her neigborhood to earn enough money to but
mixer [17]

Answer:

468.75 / 125 = $3.75 per car wash.

Step-by-step explanation:

3 0
3 years ago
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A circle with radius of 2cm sits inside a circle with radius of 4cm. What is the area of the shaded region?
uysha [10]

Answer

12.56.. I think

umm you haven't said which part of the circles is shaded but I assumed that it's the gap between the two circles

\pi {4}^{2}  -  \: \pi {2}^{2}

7 0
3 years ago
Write an equation in slope-intercept form of the line that passes through (-5, 19) and (5.13).
ruslelena [56]

Answer:

y=-3/5x+16

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(13-19)/(5-(-5))

m=-6/(5+5)

m=-6/10

simplify

m=-3/5

y-y1=m(x-x1)

y-19=-3/5(x-(-5))

y-19=-3/5(x+5)

y=-3/5x-15/5+19

y=-3/5x-3+19

y=-3/5x+16

3 0
2 years ago
A bag contains 12 red marbles The ratio of red marbles to blue marbles is 4:3?
Ostrovityanka [42]

There are 9 blue marbles.

Step-by-step explanation:

12÷4=3

3×3=9

8 0
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