1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alborosie
3 years ago
7

a.A seven-year medical research study reported that woman whose mothers took the drug DES during pregnancy were twice as likely

to develop tissue abnormalities that might lead to cancer as were women whose mothers did not take the drug.b. Do you suppose the data were obtained in a survey or an experimentc. For the population of women whose mothers took the drug DES during pregnancy, a sample of 3980 women showed that 63 developed tissue abnormalities that might lead to cancer. Provide a descriptive statistic that could be used to estimate the number of women out of 1000 in this population who have tissue abnormalities.d. For the population of woman whose mothers did not take the drug DES during pregnancy, what is the estimate of the number of women out of 1000 who would be expected to have tissue abnormalities?e. Medical studies often use a relatively large sample (in this case, 3980) why?
Mathematics
1 answer:
Serga [27]3 years ago
7 0

Answer:

Step-by-step explanation:

b. An experiment deliberately imposes some stimuli on individuals to observe their responses whereas a survey aims to gather information without affecting the individuals.  

Hence, the data was obtained in a SURVEY as the consumption of drug was not forced.

c. Given Data:  

x = 63

n = 3980

The probability will be the number of successes divided by the sample size:  

p\;=\;\frac{x}{n} =\frac{63}{3980} \\\\p\;=\;0.0158

The total number of successes is the product of the sample size and the probability of occurrence of tissue abnormalities.

x\;=\;n*p\;=\;1000*0.0158\\\\x\;=\;15.8

d. As we have no data pertaining to the population of women who did not take the drug, we cannot make estimate about the number of women that will have abnormalities.

e. Larger values of sample reduces the effect that outliers can cause on the skewness of the data. As a result the interpretations are more reliable. Hence, use of large sample sizes is necessary because people's lives could be at stake.

You might be interested in
Please help quick.
GREYUIT [131]

Answer:

The answer to your question is: third option is correct

Step-by-step explanation:

Data

F (5, -1)

directrix   y = 1

Then, after getting the graph, the vertix = (5, 0)

                                                        and p = 1

                 Formula

                              (x - h) ² = -4p(y - k)

                              (x - 5)² = -4(1)(y - 0)

                              (x - 5)² = -4y

                              y = (x - 5)² / -4

3 0
3 years ago
Given the right triangle shown, which of the following represents the value of Cos C?
GarryVolchara [31]

Answer:

where is the pic

Step-by-step explanation:

3 0
3 years ago
Which is a solution to the equation 3x^2 + 2x − 20 = 2x^2 + 15?
pychu [463]

the answer is b)-7 or it could be 5

6 0
3 years ago
Solve the equation <img src="https://tex.z-dn.net/?f=%2835%20x%5E%7B4%7D%20y%2B14%20x%5E%7B5%7D%20y-2%20y%5E%7B3%7D-4x%20y%5E%7B
jeka94
\underbrace{35x^4y+14x^5y-2y^3-4xy^3}_M\,\mathrm dx+\underbrace{7x^5-6xy^2}_N\,\mathrm dy=0

M_y=35x^4+14x^5-6y^2-12xy^2
N_x=35x^4-6y^2

\dfrac{N_x-M_y}N=\dfrac{-14x^5+12xy^2}{7x^5-6xy^2}=-2

This suggests an integrating factor depending on x only is possible, and given by

\mu(x)=\exp\left(-\displaystyle\int\frac{N_x-M_y}N\,\mathrm dx\right)=e^{2x}

Distributing across the ODE, we end up with

\underbrace{(35x^4y+14x^5y-2y^3-4xy^3)e^{2x}}_{M^*}\,\mathrm dx+\underbrace{(7x^5-6xy^2)e^{2x}}_{N^*}\,\mathrm dy=0

The equation is now exact, with

{M^*}_y={N^*}_x=(35x^4+14x^5-6y^2-12xy^2)e^{2x}

Now we find the solution:

F_x=M^*
F=\displaystyle\int(35x^4+14x^5-2y^3-4xy^3)e^{2x}\,\mathrm dx
F=(7x^5y-2xy^3)e^{2x}+f(y)

F_y=N^*
(7x^5-6xy^2)e^{2x}+f'(y)=(7x^5-6xy^2)e^{2x}
f'(y)=0
\implies f(y)=C

The general solution is then

F(x,y)=(7x^5y-2xy^3)e^{2x}=C
7 0
3 years ago
A person has 100 notes of Rs. 10 and Rs. 20 each. He went to a shop and bought items for Rs. 220. In how many ways can he pay th
Alekssandra [29.7K]

There are 12 ways he can pay this amount using the notes he has the answer is 12.

<h3>What are permutation and combination?</h3>

A permutation is the number of different ways a set can be organized; order matters in permutations, but not in combinations.

Let x be the number of Rs10 notes and y be the Rs20 note

10x + 20y = 220

The whole number of x and y which satisfy the above equation:

x = 0, y =11

x = 2, y =10

x = 4, y =9

x = 6, y =8

x = 8, y =7

x = 10, y =6

x = 12, y =5

x = 14, y =4

x = 16, y =3

x = 18, y =2

x = 20, y =1

x = 22, y =0

Total number of ways = 12

Thus, there are 12 ways he can pay this amount using the notes he has the answer is 12.

Learn more about permutation and combination here:

brainly.com/question/2295036

#SPJ2

8 0
2 years ago
Read 2 more answers
Other questions:
  • When is a protractor preferred to a ruler when finding a measurement
    7·1 answer
  • Estimate 15% as a fraction in its simplest form.
    8·1 answer
  • Jerry is 8 years younger than Patricia. Six years ago, Patricia was 3 times as old as Jerry was then. Which system of equations
    10·1 answer
  • -3x+18=7x what could you do to isolate the variable term to one side of the equation
    14·2 answers
  • Write a recursive rule for the sequence.<br><br> 7, 6, 13, 19, 32, ...
    15·1 answer
  • 14 people share 6 sandwiches how much each?
    12·2 answers
  • Find x such that 3^x = 27 mod 32 (b)
    13·1 answer
  • Lucas makes a smoothie using the recipe (berries 3/8, mango 1/2, yogurt 3/4 cups), but he also adds almond milk. He makes two 8-
    14·1 answer
  • Plsss help i’ll give brainliest if you give a correct answer
    14·1 answer
  • PLEASE HELP WITH EXPLANATION!! THANK YOU ILL GIVE BRAINLEST
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!