An epidemiologic study examined the incidence of symptomatic Chlamydia infection in a cohort of 2000 young women in a county in Georgia over 5 years. All subjects were enrolled on the same day (Jan 1, 2015), and did not have Chlamydia infection at the time of study enrollment. During the study period, 440 subjects were newly diagnosed with Chlamydia infection. Subjects were followed for a total of 6200 person-years.
If no one dropped out of the study and no one developed Chlamydia infection during the study period, how many person-years would be contributed in total by subjects in this study?
Answers
a. If no one dropped out of the study and no one developed Chlamydia infection during the study period, the total number of person-years = 10,000 person-years (2,000 x 5 years).
What are person-years?
Person-years are the product of the number of people in a study and the amount of time each person spends in the study.
Thus, since there are 2,000 women in this study, who spend 5 years each, the person-years are 10,000 (2,000 x 5) person-years.
b. The estimated incidence rate of Chlamydia infection among women who participated in the study is 0.62 or 620 per 1,000 person-years (6,200/10,000).
What is an incidence rate?
An incidence rate describes the quickness of disease occurrence in a population. Since the incidence rate is based on person-time, it has some advantages over an incidence proportion, which measures the probability of developing a disease during the specified period.
Data and Calculations:
Sample of young women = 2,000
Period of study = 5 years
Subjects newly diagnosed with infection = 440
Total number of person-years of subjects diagnosed = 6,200
Thus, the total number of person-years in the study is 10,000 person-years, while the incidence rate is 620 per 1,000.
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Related Questions
What is the volume of a right circular cylinder with a radius of 3 in. and a height of 10 in.?
o 30pi in^3
o 60pi in^3
o 90pi in^3
o 120pi in^3
Answers
90pi cubic inches
Work Shown:
[tex]V = \pi*r^2*h\\\\V = \pi*3^2*10\\\\V = \pi*9*10\\\\V = \pi*90\\\\V = 90\pi\\\\[/tex]
This approximates to 90*3.14 = 282.6 cubic inches when using the approximation pi = 3.14
Use more decimal digits of pi to get a more accurate answer.
plssss helppp meeeee
Answers
Answer:
the answer should be 152.6 ! just moving the decimal over to the left!!
QUESTION ON PIC BRAINLIEST THANK YOU!
Answers
Answer:
1, 3, 9, 27
Step-by-step explanation:
1 times 27 = 27
3 times 9 = 27
9 times 3 = 27
27 times 1 = 27
hope this helps!!!
Answer:
1, 3, 9, 27
Step-by-step explanation:
27 = 3³
The factors of 27 are:
1, 3, 9, 27
Why root 3 is irrational
Answers
Given:To find: is an irrational number. Solution: (Were p and q is a co-prime)Squaring both the side in above equationif 3 is a factor of Then, 3 will also be a factor of p {where m is a integer}Squaring both sides we getSubstitute the value of in the equation If 3 is a factor of Then, 3 will also be factor of qHence, 3 is a factor of p & q bothSo, our assumption that p & q are co-prime is wrong.So, is an "irrational number". Hence proved.
Answer:
irrational because the square root of a non-perfect square results in a non-repeating, non-terminating decimal which is what irrational numbers are described as
Step-by-step explanation:
Simplify. Write your answer as a mixed number when possible.
25/35
Answers
5 goes into 25 5 times and 5 goes into 35 7 times!!
Answer this equation NEED HELP ASAP 30 POINTS
Answers
45456346456546546546
Step-by-step explanation:
PLEASE HELP ASAP WORTH 20 POINTS Find the value of x in the triangle.
Answers
Answer:
x= 47
Step-by-step explanation:
sum of angles in a triangle are 180
so 180 = x + 85 + 48
=> 180 - 85 - 48 = x
=> x= 47
or x= 180- (85+48)
=> x= 180 - 133
x = 47
Your answer is 47 degrees
ms. Heinz spent 12 dollars on 30 tokens for the field trip. What was the cost of 12 tokens
Answers
Answer:
$4.80 for her 12 tokens. That means that each token was worth 40 cents.
Make the tokens into 1 first by dividing both sides by 30
0.4 dollars -1 token
Then times the both sides by 12 because you are trying to see how much 12 tokens are
4.8 dollars - 12 tokens
Which means the answer is 4.80 dollars
The expression (y to the power of 20)(y to the power of −5)2 is equivalent to yn. What is the value of n?
200
10
-200
30
Answers
Answer: 10
Step-by-step explanation: hope this helps
what is the least common multiple of 6, 12, and 14?
Answers
Answer:
84
Step-by-step explanation:
2x2x3x7=84
For a ride on a rental scooter, Deon paid an $8 fee to start the scooter plus 6 cents per minute of the ride. The total bill for Deon's ride was $11.96. For how many minutes did Deon ride the scooter?
Answers
Answer:
66 minutes
Step-by-step explanation:
1.
What is the area of this tile?
ina
6 in.
2 in.
Answers
Answer:u will kno3
Step-by-step explanation:6 in the side the top 2 the top
Answer:
12 inches squared
Step-by-step explanation:
Area is length, which in this case is 6 inches, by width, which in this case is 2 inches.
L times W = A
6 times 2 = 12
Write an equivalent ratio for 7:8 with 40 as one of the terms.
Answers
Answer:
Step-by-step explanation:
Five equivalent ratios:
7:8 = 14:16
= 21:24
= 70:80
= 49:56
= 35:40
Someone, please help me! If you give it right, ill give you Brainiest.
If you don't know the answer, please don't comment.
Can you explain every step you have to do to solve √(24^2 + 12^2?)
Answers
Answer:
[tex] \sqrt{576 + 144} [/tex]
[tex] \sqrt{720} [/tex]
[tex] \sqrt{12^{2} } \times \sqrt{5} [/tex]
[tex]{12 \times \sqrt{5} } [/tex]
-8-8x^2=-31
how to solve for x
Answers
Answer:
x = ± [tex]\sqrt{\frac{23}{2\sqrt{2}}}[/tex]
Step-by-step explanation:
-8 - 8x^2= -31
Since this is a quadratic, it needs to be factored.
First, move the x to the other side:
-8 = 8x^2 - 31
Then, get the x alone by first adding 31:
23 = 8x^2
then dividing by 8:
x^2 = 23/8
Finally, square root both sides and remember the even roots property:
x = ± [tex]\sqrt{\frac{23}{8}}[/tex]
and simplify the root 8:
x = ± [tex]\sqrt{\frac{23}{2\sqrt{2}}}[/tex]
Note: This answer may have a mistake.
Write each decimal or fraction as a percent round to the nearest 10th of a part of a percent where necessary 0.72
Answers
Answer:
72%
Step-by-step explanation:
when they are nice decimals like that move the dot to the left 2 times
Which Shape is a Parallelogram
Answers
Answer:
The 1st one.
Step-by-step explanation:
Because all parallelograms are connected each sides.
Answer: its the one to the right the first question thats a Parallelogram
Step-by-step explanation the first one is a Parallelogram because it has 4 sqaures trust me ur gonna get this right i got it right u should too
The real roots of the equation x2 - 7x + 10 = 10 are?
Answers
[tex]\\ \tt\hookrightarrow x^2-7x+10=10[/tex]
[tex]\\ \tt\hookrightarrow x^2-7x=0[/tex]
[tex]\\ \tt\hookrightarrow x(x-7)=0[/tex]
[tex]\\ \tt\hookrightarrow x=(0,7)[/tex]
Roots are 0 and 7The resulting roots of the equation x2 - 7x + 10 = 10 is mathematically given as
x=0, x=7
Roots of Quadratic EquationQuestion Parameters:
The real roots of the equation x2 - 7x + 10 = 10
Generally the expression for the equation is mathematically given as
x^2 - 7x + 10 = 10
Therefore
x^2 - 7x =0
x(x-7)=0
Therefore
The resulting roots are
x=0
x=7
For more information on Equation
https://brainly.com/question/2263981
Solve using pythagorean theorum! problem is in picture!
Answers
Answer: the answer x=11 or 10
Step-by-step explanation:
Answer:
x=8 cm
Step-by-step explanation:
100 = 36 + x^2
x^2 = 64
= 8 cm
Which trigonometric ratios are correct for triangle DEF?
Select three options
sin(E) = 24/25
cos(D) = 7/25
tan(E) = 24/7
sin(D) = 7/25
tan(E) = 7/24
cos(E) = 24/25
Answers
Answer:
A, C, D
Step-by-step explanation:
Edge2022
Multiply. Write the answer in simplest form. 1/8 x 3/5
Answers
Answer:
3/40
Step-by-step explanation:
1/8 * 3/5
1 * 3 = 3
8 * 5 = 40
3/40
Simplify.........
[tex] \huge(2 \frac{3}{4} - 1 \frac{1}{3} ) \times \frac{3}{4} [/tex]
Answers
Answer:
[tex](\frac{11}{4}-\frac{4}{3})*\frac{3}{4}\\(\frac{33-16}{12})*\frac{3}{4} \\ \frac{17}{12} *\frac{3}{4} \\\frac{51}{48} \\\frac{17}{16}[/tex]
Step-by-step explanation:
Here please helppppppppppppp
Answers
Answer:
Part 2 - ∠EGF = 105° Part 3 - ∠D = 65________________________________________________Step-by-step explanation for Part-2:
We know that:
∠EFG = 32°∠AEG = 137°∠EFG + ∠FGE + ∠GEF = 180°Work:
∠EFG + ∠FGE + ∠GEF = 180°32 + ∠FGE + (180 - 137) = 180°=> 32 + ∠FGE + 43 = 180°=> 75 + ∠FGE = 180°=> ∠FGE = 180 - 75=> ∠FGE = ∠EGF = 105°Hence, the measure of ∠EGF is 105°.
________________________________________________Step-by-step explanation for Part-3:
We know that:
CD = CAThis triangle is an isosceles triangle.∠D = ∠AWork:
50 + ∠D + ∠A = 180=> ∠D + ∠D = 130=> 2∠D = 130=> ∠D = 130/2=> ∠D = 65Hence, the measure of ∠D is 65°
________________________________________________Suppose the travel time between two major cities A and B by air is 6 or 7 hr if the flight is nonstop; however, if there is one stop, the travel time would be 9, 10, or 11 hr. A nonstop flight between A and B would cost $1200, whereas with one stop the cost is only $550. Then between cities B and C, all flights are nonstop requiring 2 or 3 hours at a cost of $300.
The sample space of his travel times from A to C to be [8,9,10,11,12,13,14] and the sample space of his travel cost from A to C to be [850,1500].
Required:
If T=travel time from city A to city C, and S=cost of travel from A to C, what is the sample space of T and S?
Answers
Using it's concept, it is found that the sample space of T and S is:
{{8, [850-1500]}, {9, [850-1500]}, {10, [850-1500]}, {11, [850-1500]}, {12, [850-1500]}, {13, [850-1500]}, {14, [850-1500]}}
What is the sample space of an experiment?The sample space is the set that contains all possible outcomes for an experiment.
In this problem:
The sample space of T is: [8,9,10,11,12,13,14]The sample space of S is: [850,1500].Considering that for each time, the cost will be between $850 and $1500, the sample space for T and S is:
{{8, [850-1500]}, {9, [850-1500]}, {10, [850-1500]}, {11, [850-1500]}, {12, [850-1500]}, {13, [850-1500]}, {14, [850-1500]}}
You can learn more about sample space at https://brainly.com/question/25861936
The following table shows worldwide sales of a certain type of cell phone and their average selling prices in 2012 and 2013.
Year 2012 2013
Selling Price ($) 375 325
Sales (millions) 958 1,228
(a)
Use the data to obtain a linear demand function for this type of cell phone. (Let p be the price, and let q be the demand).
q(p) =
Use your demand equation to predict sales if the price is lowered to $275.
[. ] million phones
(b)
Fill in the blank.
For every $1 increase in price, sales of this type of cell phone decrease by [. ]
million units.
Answers
The demand equation illustrates how the price and the quantity of an item are related
The linear demand equation is: [tex]q = -5.4p + 2983[/tex]If the price is lowered to $275, the sales is 1498For every $1 increase in price, sales of this type of cell phone decrease (a) Obtain the linear demand equationFrom the question, we have the following ordered pairs
(x, y) = {(375,958) and (325,1228)
Start by calculating the slope (m)
[tex]m = \frac{y_2 -y_1}{x_2 -x_1}[/tex]
So, we have:
[tex]m = \frac{1228 - 958}{325 - 375}[/tex]
[tex]m = \frac{270}{-50}[/tex]
[tex]m = -5.4[/tex]
The linear demand equation is then calculated as:
[tex]y =m(x - x_1) + y_1[/tex]
So, we have:
[tex]q = -5.4(p - 375) +958[/tex]
[tex]q = -5.4p + 2983[/tex]
When the price is $275, the sales is:
[tex]q = -5.4 * 275 + 2983[/tex]
[tex]q = 1498[/tex]
Interpret the demand equationThe demand equation means that:
For every $1 increase in price, sales of this type of cell phone decrease by $5.4
Read more about demand equations at:
https://brainly.com/question/10014863
A gardener wants to fertilize 900 African violets. Each container of fertilizer will supply up to 65 plants. How many containers will she need to do the job?
Answers
Answer:
900÷65 = 13.86
Step-by-step explanation:
you'll put the answer how is needed
There were 25 runners competing in a race. The number of runners who finished ahead of Paula was one-third the number of runners who finished after her. In what place did Paula finish?
Answers
Answer:
7th Place
Step-by-step explanation:
Seeing as how the number of runners in front of Paula is [tex]\frac{1}{3}[/tex] the number of runners behind her,
Assign the number of people behind Paula to a variable:
# of people behind Paula = b, which means
# of people ahead of Paula = [tex]\frac{1}{3}[/tex] b
Use the variable to make an equation:
b (people behind Paula) + [tex]\frac{1}{3}[/tex] b (people ahead of Paula) + 1 (Paula) = 25
b + [tex]\frac{1}{3}[/tex] b + 1 = 25
Solve for b:
b + [tex]\frac{1}{3}[/tex] b + 1 = 25
b + [tex]\frac{1}{3}[/tex] b = 24
[tex]\frac{4}{3}[/tex] b = 24
b = 18
If there are 18 people behind Paula, there are [tex]\frac{1}{3}[/tex] * 18 people in front of her, which is 6; This puts Paula in 7th place.
Mark has invested in evu confectioners. he owns 220 shares of stock in evu confectioners, with each share costing him $14.79 apiece but paying a yearly dividend of $2.03. mark also owns three par value $500 bonds from evu confectioners, each of which had a market value of 93.630 and which pay 8.8% interest. if mark’s broker charges a commission of $55 per ten shares of stock bought or sold and a commission of 3% of the market value of each bond bought or sold, which aspect of mark’s investment in evu confectioners has the greater percent yield, and how much greater is it?
Answers
Based on the returns on both the stock and bonds, we can find that stocks have a greater percentage yield by 0.88%.
Return on Stock= Dividend on stock / ( Cost of stock + Commission) x 100%
Commission is:
= 55/ 10
= $5.50 per share
Return is therefore:
= 2.03/ (14.79 + 5.5) x 100%
= 10%
Return on Bonds= Interest earned / (Market value of bonds + Commission) x 100%
Interest earned:
= 8.8% x 500 x 3 bonds
= $132
Market value of bonds:
= 0.93630 x 500 x 3 bonds
= $1,404.45
Commission:
= 3% x 1,404.45
= $42.1335
Return on bonds is:
= 132 / (1,404.45 + 42.1335) x 100%
= 9.12%
Difference in return= 10% - 9.12
= 0.88%
In conclusion, stock has a higher yield by 0.88%.
x3+y3+z3=k
plz answer it i will need it
Answers
Answer:
42
Step-by-step explanation:
My teacher has asked the class this one before and after a lot of time not knowing she just told us k=42 XD
Answer:
x=1/3k-y-z
Step-by-step explanation:
this is the answer used solved this problem before
In the expression 7 1/2 divided by 3/4, which number is the dividend?
Answers
Answer:
7 1/2
Step-by-step explanation:
The number that is being divided is the dividend
