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algol13
4 years ago
5

In a study to support drug discovery for patients with lung cancer, patients were divided into 3 groups based on the severity of

the disease. Smoking and alcohol consumption habits were recorded for all 3 groups. Is this an example of an observational study or experimental study
Mathematics
1 answer:
katrin [286]4 years ago
4 0

Answer:

It is an example of an observational study.

Step-by-step explanation:

You might be interested in
Find m∠1<br><br> A. 38 degrees<br> B. 42 degrees<br> C. 52 degrees<br> D. 78 degrees
Zepler [3.9K]
Let's solve this problem step-by-step.

Let's first establish the following formula:

Angle sum of a triangle = 180°

Also, note that the square shape in the top-right corner of the triangle indicates that it is a right-angle. This means that, that angle is equal to 90°.

Now, let's establish the equation we will be using to solve this problem based on the previous information as displayed below:

m + 38° + 90° = 180°

We will now simply solve the equation in order to obtain the value of ( m ) as display below:

m + 38° + 90° = 180°

m = 180 - 38 - 90

m = 52°

ANSWER:

Therefore, the answer is:

C. 52 degrees.


Please mark as brainliest if this was helpful! <3
Thank you : )
4 0
3 years ago
The mean of a set of data is -3.82 and its standard deviation is 2.31. Find the z score for a value of 3.99.
gtnhenbr [62]

Answer:

The z- score for a value of 3.99 will be 3.38.

Step-by-step explanation:

It is given that the mean of a set of data is -3.82 and its standard deviation is 2.31.

Thus, the value of the z-score=\frac{value-mean}{standarddeviation}

=\frac{3.99-(-3.82)}{2.31}

=\frac{3.99+3.82}{2.31}

=\frac{7.81}{2.31}

=3.38

Thus, the z- score for a value of 3.99 will be 3.38.

6 0
3 years ago
Et
Irina18 [472]
So ugh your Answer is c
7 0
2 years ago
A carpenter has 16 1/2 m of wood. He cuts the wood into pieces that are each 2 3/4 m long. How many pieces of wood does the carp
NNADVOKAT [17]
Simplify the denominator so it is the same 
divide the 4 by 2
4 divided by 2=2 
now the denominator the same.
16 1/2
2 3/2 
multiply 3x1
so far, it is 3/2
it is an improper fraction
divide.
2 divides by 3 = 0.1 i know
1/2
Hope this helped :D! can you mark me brainliest...



5 0
4 years ago
Read 2 more answers
How do we do this out?
mars1129 [50]

\dfrac{ {2x}^{2} + 7x + 6 }{x + 2}  \\  \\  =  \dfrac{(2x + 3)(x + 2)}{x + 2}  \\  \\  = 2x + 3

Answer : 2x + 3

Hope this helps. - M
6 0
4 years ago
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