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boyakko [2]
2 years ago
14

Squawk, a social networking site, sent out a survey to participants at a technology conference. One of the questions in 2016 was

, "Do you watch the nightly news?" More than 2,350 people responded, with 42% responding yes. What can you conclude from the survey?
B. The poll used a convenience sample, so the results tell us little about the population of all adults.
C. The sample is too small to draw any conclusions.
D. The poll used systemic sampling, so the results tell us little about the population of all adults.
E. None of the previous answers is correct.
Mathematics
1 answer:
Murrr4er [49]2 years ago
3 0

Squawk, a social networking site, sent out a survey to participants at a technology conference. One of the questions in 2016 was, "Do you watch the nightly news?" More than 2,350 people responded, with 42% responding yes. What can you conclude from the survey?

A. About 42% of people watched the nightly news in 2016

B. The poll used a convenience sample, so the results tell us little about the population of all adults.

C. The sample is too small to draw any conclusions.

D. The poll used systemic sampling, so the results tell us little about the population of all adults.

E. None of the previous answers is correct

Answer:

The correct answer is B) The pool used a convenience sample so the results tell us little about the population of all adults.

Step-by-step explanation:

When sampling is done with the population that is close at hand, then it is called Convenience sampling. It is also is a type of non-probability sampling that involves the sample being drawn from that part of the population that is readily available. This type of sampling is used mostly for pilot testing.

Another example of this sort of sampling would be for one to stand in a busy shopping an ask people to respond to questions.

Cheers!

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Answer:

\left[\begin{array}{cc}3&9\\5&-2\end{array}\right] +\left[\begin{array}{cc}6&0\\-8&4\end{array}\right]=\left[\begin{array}{cc}9&9\\-3&2\end{array}\right]

Step-by-step explanation:

To add matrices, we add the corresponding components.

The given matrices is

\left[\begin{array}{cc}3&9\\5&-2\end{array}\right] +\left[\begin{array}{cc}6&0\\-8&4\end{array}\right]

We add the corresponding components to get;

\left[\begin{array}{cc}3&9\\5&-2\end{array}\right] +\left[\begin{array}{cc}6&0\\-8&4\end{array}\right]=\left[\begin{array}{cc}3+6&9+0\\5+-8&-2+4\end{array}\right]

We simplify to get:

\left[\begin{array}{cc}3&9\\5&-2\end{array}\right] +\left[\begin{array}{cc}6&0\\-8&4\end{array}\right]=\left[\begin{array}{cc}9&9\\-3&2\end{array}\right]

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Answer:

1.21 g/day

Step-by-step explanation:

We are given that

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We are given P(t)=6

Substitute the value

6=2+5tan^{-1}(\frac{t}{2})

5tan^{-1}(\frac{t}{2})=6-2=4

tan^}{-1}(\frac{t}{2})=\frac{4}{5}

\frac{t}{2}=tan(\frac{4}{5})

t=2tan(\frac{4}{5})

Substitute the value of t

P'(2tan\frac{4}{5})=\frac{10}{4+4tan^2(\frac{4}{5})}

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P'(2tan\frac{4}{5})=\frac{5}{2}\times cos^2(\frac{4}{5})

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