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Debora [2.8K]
3 years ago
9

1. _______ questions should be unbiased. A) All B) Random C) Test D) Survey

Mathematics
2 answers:
vladimir1956 [14]3 years ago
6 0
I would say answer C.test
Anna71 [15]3 years ago
3 0

Answer:

C

Step-by-step explanation:

I think test questions should be unbaised because you cannot interpet an answer to be wrong or right, because one's answer would then depend on one's oppinion.

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2. In a given country, records show that of the registered voters, 45% are Democrats, 35% are Republicans, and 20% are independe
Kitty [74]

Answer:

P(R) = 0.14

P(I) = 0.16

P(D) = 0.315

Step-by-step explanation:

Let Democrat = D

Republican = R

Independent = I

If 45% are Democrats, 35% are Republicans, and 20% are independents, then

Total registered voters = 100

 In an election, 70% of the Democrats, 40% of the Republicans, and 80% of the independents voted in favor of a parks and recreation bond proposal. That is,

D = 0.7 × 45 = 31.5

R = 0.4 × 35 = 14

I = 0.8 × 20 = 16

 If a registered voter chosen at random is found to have voted in favor of the bond, what is the probability that the voter is

a Republican:

P(R) = 14 /100 = 0.14

an Independent

P(I) = 16/100 = 0.16

a Democrat

P(D) = 31.5/100 = 0.315

6 0
3 years ago
Marcus states that the polynomial expression 3x3 – 4x2y + y2 + 2 is in standard form. Ariel states that it should be y2 – 4x2y +
lubasha [3.4K]
The degree of a polynomial is the highest power of its terms.
The power of a term is the sum of the powers of all the variables in a term.
A polynomial is written starting with the greatest power in standard form.
In the first case, the power of the first term is 3, the power of the second is 3 (2 from x + 1 from y) but the power of x has decreased so it is the second term, and then so on. 
In the second case, the power is starting form 2 and then increasing to 3. This is incorrect.
Therefore, Marcus' suggestion is correct.
4 0
3 years ago
Read 2 more answers
What is the sum of the first five terms of a geometric series with a1 = 6 and r = 1/3?
tresset_1 [31]
The sum of the terms of a geometric sequence with common ratio lesser than 1 is calculated through the equation,

                                  Sn = (a1) x (1 - r^n) / (1 - r)
Substituting the known values,
                                 S5 = (6) x (1 - (1/3)^5) / (1 - 1/3) = 242/27
Thus, the sum of the first five terms is approximately equal to 8.96. 

6 0
4 years ago
Read 2 more answers
Find the perimeter and the area of the given figure:<br><br> PLSSSSSSSSSSSSSSSSSS
Lera25 [3.4K]

Answer:

perimeter: 26

area: 16 + 10 =26

perimeter: add all lengths.

area: multiply LxW

5 0
3 years ago
Read 2 more answers
The? ___________ is a value used in making a decision about the null hypothesis and is found by converting the sample statistic
maks197457 [2]
The test statistic <span>is a value used in making a decision about the null hypothesis and is found by converting the sample statistic to a score with the assumption that the null hypothesis is true. </span>
6 0
4 years ago
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