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Mkey [24]
4 years ago
12

Fill in the Blank: When evaluating an observational study, the four factors that should be reviewed are Introduction, Methodolog

y, Results, and _____________.
Mathematics
2 answers:
bonufazy [111]4 years ago
6 0
The correct term to fill in the blank would be   discussion. When evaluating an observational study, the four factors that should be reviewed are Introduction, Methodology, Results, and Discussion. In an observational study, the researcher cannot control the variables. The researcher wold draw some inferences from a set of sample without controlling anything.
notka56 [123]4 years ago
4 0

Answer:

Discussion- A

Step-by-step explanation:

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If n(A u B)=23, n(A n B)=9,and n(B)=12. find n(A)
Digiron [165]

Answer:

\boxed{n(A) = 20}

Step-by-step explanation:

We know

n(B)= 12

From n(A \cap B)=9  and n(A \cup B)=23, we conclude  n(A \cup B)=23 = n(A \cap B) + n(A- B) + n(B- A)

Once  n(B)= 12, then  n(B- A) = 12-9 = \boxed{3}

Taking

23 = n(A \cap B) + n(A- B) + n(B- A) = 9+ n(A- B) +3 =  \boxed{12+ n(A- B) }

Therefore,

n(A- B) =11 \implies n(A) - 9 = 11 \implies  \boxed{n(A) = 20}

6 0
3 years ago
Which number is the same value of20 tens
vekshin1
200 is the answer m8<span />
4 0
3 years ago
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Expression A: 3(x + 2) Expression B: 3x + 6....... Which statement does not show that these expressions are equivalent? O A. Sub
Dovator [93]

Answer:

D. 3(x+2) can be rewritten as 3x + 6 using the distributive property

Step-by-step explanation:

Given

3(x + 2) = 3x + 6

Required

Explain

From the list of given options, option D answers the question.

This is because, the expression above involves distributive property and only option D correctly states that.

A distributive property is:

a*(b + c) = a*b + a * c

In this case:

a = 3  b = x   and c = 2

So:

a*(b + c) = a*b + a * c

Substitute values for a, b and c

3*(x + 2) = 3 * x + 3 * 2

3(x + 2) = 3x + 6

5 0
3 years ago
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jonny [76]

let's say 12 min - 2 mins = 10 mins

and 1.4 mile - 0.9 miles = 0.5 miles

Jessica takes 10 mins to walk a distance of 0.5 miles

=> 10 mins*6 = 60 mins = 1 hour

=> 0.5 miles*6 = 3 miles

her rate is 3 miles per hour

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3 years ago
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Plzz help!!!! if 200 meters to the next freeway exit how far away is the exit in yards?
kifflom [539]
218.723 yards I'm pretty sure that's what it is
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