This question is incomplete, the complete question is;
A screening examination was performed on 250 persons for factor X, which is found in disease Y. A definitive diagnosis for disease Y among the 250 persons had been obtained previously. The results are charted here:
Test Results Disease Present Disease Absent
Positive for Factor X 40 60
Negative for Factor X 10 140
a) Based on the information provided, The sensitivity of this test is expressed as: A. 30%. B. 80%. C. 56%. D. 70%. E. 7%.
b) Based on the information provided, The specificity of this test is expressed as: A. 30%. B. 80%. C. 56%. D. 70%. E. 7%.
Answer:
a)
The sensitivity of this test is expressed as 80%
Option B) 80% is the correct answer.
b)
The specificity of this test is expressed as 70%
Option D) 70% is the correct answer.
Step-by-step explanation:
Given the data in the question;
Test Results Disease Present Disease Absent
Positive for Factor X 40 60
Negative for Factor X 10 140
Number of persons affected by disease with positive factor of X = 40
Number of persons with negative factor of X without the disease = 140
Total number of persons affected by the disease = 40 + 10 = 50
Total number of persons not affected by the disease = 60 + 140 = 200
a) Sensitivity of the Test;
Sensitivity = [( Number of persons affected by disease with positive factor of X ) / ( Total number of persons affected by the disease )] × 100
we substitute
Sensitivity = [ 40 / 50 ] × 100
Sensitivity = 0.8 × 100
Sensitivity = 80%
Therefore, The sensitivity of this test is expressed as 80%
Option B) 80% is the correct answer.
b) The specificity of the test;
Specificity = [ ( Number of persons with negative factor of X without the disease) / ( Total number of persons not affected by the disease ) ] × 100
we substitute
Specificity = [ 140 / 200 ] × 100
Specificity = 0.7 × 100
Specificity = 70%
Therefore, The specificity of this test is expressed as 70%
Option D) 70% is the correct answer.
4 + 8x = -12
what is X?
Answer:
x=-2
Step-by-step explanation:
4+8x=-12
-4 -4
8x = -16
/8 /8
x = -2
Answer:
X=(-2)
Step-by-step explanation:
8(-2)=(-16)
so -16+4=(-12)
HELP IT'S DUE IN 2 MINUTES
Answer:
D) 2² × 3³ × 7
Step-by-step explanation:
Hope this helps! Have a nice day :)
(DOK 2)
Find the area of each triangle. Round to the nearest tenth.
5
40°
3
Answer:
D
Step-by-step explanation:
The area (A) of the triangle is calculated as
A = [tex]\frac{1}{2}[/tex] ab sinC ( a, b are the sides and C the angle between them ) , then
A = [tex]\frac{1}{2}[/tex] × 5 × 3 × sin40° = 7.5 × sin40° ≈ 4.8 units² ( to nearest tenth )
GNRJGWUAU HELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP PLease explain ALsssooooOOoo
Answer:
[tex]110 \degree = (4t + 90) \\ 4t = 20 \\ t = 5[/tex]
Help mee…pleasseeessss
OK BESTIES I NEED SOME HELP ASAP!!!
A two-dimensional cross section is taken of a three-dimensional object. If this cross section is a triangle, what can be the three-dimensional object?
A. Cone
B. Cylinder
C. Pyramid
D. Rectangular prism
Answer: C. Pyramid
Step-by-step explanation:
A cylinder is kind of like a paper towel roll.
A Rectangular prism is more like a cube.
A cone has a round part on the bottom.
And a Pyramid is this ...
Please help me!! Please!
Answer:
Step-by-step explanation:
The first answer choice is correct i ma 100% sure
Answer:
(-1.2,0.3)
Step-by-step explanation:
does this help you
Please help !!! Number 11
Answer:
C) 153.9 in²
Step-by-step explanation:
14 ÷ 2 = 7
π = 3.14
3.14×7×7 = 153.9 in²
hope this helps!
Answer:
answer should be 154 but 153.9 in sq is the closest.
we have to find the area right?
Simplify
[tex]\frac{4\sqrt{6} }{\sqrt{30} }[/tex] by rationalizing the denominator. Show your work.
Answer:
[tex]\frac{4\sqrt{5} }{5}[/tex]
Step-by-step explanation:
Multiply the numerator and denominator by the conjugate.
Evaluate. Write your answer as a fraction in simplest form.
What are the side lengths of square 4 and square 5 in terms of a and b? Do the two squares have the same area?
Please hurry
Answer:
Yes side lengths are the same
Step-by-step explanation:
For square 4 :
a + b
For square 5 :
a + b
Hence,
Side lengths are the same for both squares.
This can be clearly evaluated from the picture attached
A watermelon that weighs 9 pounds costs $4.50.
What is the price per pound?
Answer:
0.5 cents per pound.
4.50/9 = 0.5
Please mark me brainliest! I hope this helps!
anwers :
a. dotted
b. y=-x+4
c. y=x-4
d. y=x+1
e. solid
f. yes
g. no
Answer:
Those answers are correct
This reduction was drawn at a scale of 1 inch scaled to 4 feet actual. What is the actual height of the giraffe?
Answer:
5 inches tall i think
Step-by-step explanation:
sorry if its wrong
Can anyone help me please
Answer:
A, E
Step-by-step explanation:
The mean of the pizza truck:
(400 + 800 + 1000 + 1000)/4 = 800
The mean of the burger truck:
(800 + 700 + 900 + 800)/4 = 800
A is correct, which voids answer C
The median of the pizza truck:
400, 800, 1000, 1000
\ /
900
The median of the burger truck
700, 800, 800, 900
800
900>800 so E is correct, voiding all other answers
Abby earned $600 this past
summer babysitting. She decided
to put this money in a bank that
earns a 5% simple interest rate.
How many years will it take to
double her initial deposit?
do step my step equation or your answer gets reported for false info THANKSSS. I'll mark brainlist
Answer:
2 years
Step-by-step explanation:
5%× 600= $30
$30×2=$60
not sure if you will get what I mean but that's how I worked it out.
Answer:
[tex]I = \frac{PRT}{100}[/tex]
P= $600
R= 5%
[tex]I = \frac{600 \times \ 5 \times T}{100} = 30T\\\\[/tex]
A = double the deposit =2 600= $1200
[tex]A = I + P \\1200 = 30T + 600\\30T = 600\\T = 20[/tex]
Factor 16x+40y I don't know how to do this
Answer:
8(2x + 5y)
Step-by-step explanation:
You cant fact (take out) 8 from both 16 and 40 since 8 is a factor for both.
Step-by-step explanation:
=16x+40y
=8(2x+5y)
stay safe healthy and happy.Find the MEAN, MODE, MEDIAN, and RANGE for the following Data: 6, 8,4, 1,4,7
Answer:
Mean:5
Mode: 4
Range: 7
Median: 5
Step-by-step explanation:
Round-Off 12579,18375 To The Nearest 10
Answer:
12579 nearest ten = 12580
18375 nearest ten = 18370
Increase 20g by 10%
Answer:
22g ..................m
Fill in the missing number.
30% of __ =27
9514 1404 393
Answer:
90
Step-by-step explanation:
The number that goes in the blank is x, where ...
0.30x = 27
Dividing by 0.30, we find ...
x = 27/0.30 = 90
Then ...
30% of 90 = 27
Can someone please help with this ASAP thank you
Answer:
2.7, 3, 6
Step-by-step explanation:
The percentage difference from 239,900 to 251,895
Answer:
4.87805%
Step-by-step explanation:
yuh yw
Answer:
= 4.87805% difference
Solution:
Calculate percentage difference
between V1 = 239900 and V2 = 251895
|V1−V2|[(V1+V2)2]×100=?
=|239900−251895|[(239900+251895)2]×100
=|−11995|[4917952]×100
=11995245897.5×100
=0.0487805×100
=4.87805%difference
Refer to the figure to complete the following item.
Given: PB tangent PV, PU secants
angle1=30 and mSTarc= 20, then mVUarc=___
Answer:
Answer: 80°
Step-by-step explanation:
Since, If two secants intersect outside the circle, then the measure of the angle formed is one half of the difference of the measures of the intercepted arcs.
In the given diagram,
Chord VS and chord UT are intersecting externally,
Also, ∠SPT is the angle formed by the intersection of these chords.
Thus, by the above property,
⇒ Measurement of the arc VU= 80°.
Answer:
80 is the correct answer
Step-by-step explanation:
50 POINTS FOR THIS MATH QUESTION
Answer:
B; 1
Step-by-step explanation:
Firstly, we need to find the inverse of the given function
Let us have f(x) as y
To find the inverse, we set out to make x the formula subject
Thus;
y = √(3x + 6)
square both sides
y^2 = 3x + 6
3x = y^2 - 6
x = (y^2 - 6)/3
To write the inverse, replace y by x
So we have the inverse of the function as ;
(x^2 - 6)/3
So what we have to do here is to substitute 3 for x in the inverse
We have this as;
(3^2 -6)/3
(9-6)/3
= 3/3 = 1
Answer:
1 ( option B )
Step-by-step explanation:
The given equation is ,
[tex]\implies f(x) =\sqrt{ 3x + 6 }[/tex]
Now substituting y = f(x) , we have ,
[tex]\implies y=\sqrt{ 3x + 6 }[/tex]
For finding the inverse , Interchange x and y , we have ,
[tex]\implies x =\sqrt{ 3y + 6 }[/tex]
Now solve for y , we have ,
[tex]\implies x ^2=3y + 6 \\\\\implies 3y = x^2-6 \\\\\implies y =\dfrac{x^2-6}{3} [/tex]
Now replace y with f-¹(x) , we have ,
[tex]\implies f^{-1}(x) =\dfrac{x^2-6}{3} [/tex]
Now put x = 3 , we have ,
[tex]\implies f^{-1}(3) =\dfrac{3^2-6}{3}\\\\\implies f^{-1}(3) = \dfrac{9-6}{3}\\\\\implies \underline{\underline{ f^{-1}(3) = 1 }} [/tex]
Help please! No links
Answer:
Y=x+3
Step-by-step explanation:
Just subtract the x value from the y value and you will always get the right answer... But isn't this iready? A test?
The Surface are of a cylinder is 325 inches. The Lateral area is 200 in. What is radius of each base?
Answer:
The radius of each base is 4.46 inches.
Step-by-step explanation:
The surface area (SA) of a cylinder is given by:
[tex]SA = 2\pi rh + 2\pi r^{2} = 325[/tex] (1)
Where:
r: is the radius of each base
h: is the height of the cylinder
Now, the lateral area (LA) is:
[tex]LA = 2\pi rh = 200[/tex] (2)
Hence, by entering equation (2) into equation (1) we have:
[tex] SA = LA + 2\pi r^{2} [/tex]
[tex] 325 = 200 + 2\pi r^{2} [/tex]
[tex] r = \sqrt{\frac{325 - 200}{2\pi}} = 4.46 in [/tex]
Therefore, the radius of each base is 4.46 inches.
I hope it helps you!
Given GH with endpoints (-7,3) andH (7. - 11), what are the coordinates of the
mielpoint of GH?
Answer:
Midpoint is (0, -4)
Step-by-step explanation:
x-coordinate of midpoint = (-7 + 7)/2 = 0/2 = 0
y-coordinate of midpoint = (3 - 11)/2 = -8/2 = -4
Midpoint is (0, -4)
Answer:
(0,-4)
Step-by-step explanation:
(x1 + x2/2, y1 + y2/2)
(-7 + 7/2 , 3 + -11/2)
(0/2, -8/2)
(0,-4)
hey! please help i’ll give brainliest! if it lets me:)
Answer:
the answer is A
Step-by-step explanation: golf balls are lighter than bowling balls.
Answer:
first answer is correct answer
I need the answer to this ASAP
Answer:
x = 37
Step-by-step explanation:
These 2 angles are equal to each other because they're vertical angles:
2x = 74
2/2x = 74/2
x = 37
Answer:
The answer is 53
Step-by-step explanation:
74+2x=180
2x=180-74
X=106/2
=53 answer
Plz Mark it as brainliest answer