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Wittaler [7]
2 years ago
14

What is the answer and why is it correct explain

Mathematics
1 answer:
Colt1911 [192]2 years ago
7 0
Top left is you answer
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the video states that 56% of high school students report using sunscreen in 2011, while 68% reported using sunscreen in 2001, le
iVinArrow [24]

Answer:

For any conclusion to be made on the population based on a sample survey, the sample must be representative of the population. Sample represents the population if the following condition is fulfilled:-

The sample is a Simple Random Sample (SRS). A SRS is chosen in such a way that all possible samples of size n are equally likely. This implies that the sample is not biased.

Getting the representative sample is the challenge. The flaws / conditions ignored by the researchers in this case can be:-

Are only male students surveyed? In that case, the female population is ignored.

Are the students surveyed are from a particular region only? Say students surveyed are from "Alaska" where it is cold in most part of the year and people tend to use less sunscreen.

Are students surveyed are from a particular age group only? Say student surveyed are only from Grade 6. Then the sample does not represent students from other grades.

There are chances that the survey was done at the convenience of the surveyor who approached only those students who were approachable - those playing outside the school. This is called convenience sampling. Though the individuals contacted are easy to contact, they may not be representative of the population.

Step-by-step explanation:

3 0
3 years ago
Find the greatest maximum y-value of the following equation:
KatRina [158]
A quick way to do this is by recalling the fact that -1\le\cos x\le1, so the largest value that \cos ax alone (for any real value of a) can take on is 1.

This means -3\le3\cos2x\le3, and so 1\le3\cos2x+4\le7.

So the maximum value of this function is 7.
5 0
3 years ago
Simplify the expression: show all ur steps/ wrk PLEASE,1+2x3-18/3+(5(2+2)]
Maurinko [17]
Ok let's do this*pops knuckles*



let's add the first side

1 + 2 \times 3 - 18
order of operations demands that we do multiplication first(P.E.M.D.A.S)

so
2 \times 3 = 6
now we can add the 1 from
1 + (6) - 18
into our six


6 + 1 = 7
now we substract

(7) - 18 =  - 11
now we have
- 11  \div 3 + (5(2 + 2))
now we focus on the
other side
3 + (5(2 + 2))
since 5 is in paranthesis we use something called the distributive property. it mean we will multiply the 5 by both of the 2.
(5(2 + 2)) = (((5 \times 2) + (5 \times 2) = 20
now we have
3  + 20 = 23

(the three is from the original equation)

now we plug in our final numbers

- 11 \div 23
or
\frac{ - 11}{23}
I hope this helps
4 0
2 years ago
Read 2 more answers
If |lm and m&lt;6 = 4x - 15 and m&lt;7 = x+30, then m&lt;6 =<br> 35<br> 45<br> 39<br> 15
pentagon [3]

Answer:

∠ 6 = 45°

Step-by-step explanation:

∠ 6 and ∠ 7 are alternate angles and are congruent, thus

4x - 15 = x + 30 ( subtract x from both sides )

3x - 15 = 30 ( add 15 to both sides )

3x = 45 ( divide both sides by 3 )

x = 15

Thus

∠ 6 = 4x - 15 = 4(15) - 15 = 60 - 15 = 45°

4 0
2 years ago
What is 975, 462 round to the nearest hundred thousand
podryga [215]

Answer:

it would be 1 million, ( 1,000,000 )

Step-by-step explanation:

1.) look to the right of the nine , (7)

2.) 7 is greater than five therefore rounding it up to 1,000,000

5 0
3 years ago
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