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
photoshop1234 [79]
3 years ago
11

Candidate A and Candidate B are running for president. You are planning a survey to determine what

Advanced Placement (AP)
1 answer:
IRISSAK [1]3 years ago
7 0

Answer:

97

I am sorry because I don't have any explanation for this answer so you can just ask any maths map who is definitely better and very smarter than me so thank you and have a nice day and don't please please even write my answers

You might be interested in
Is this study an experiment or an observational study? Explain your answer.
seraphim [82]

Answer:

Explanation:

Hello!

Full text in the attachment.

a)

Little reminder:

An observational study is one where the investigator has no control or intervenes on it. He just defines the variable of interest and merely collects and documents the information. These types of studies are usually made as precursors to a more formal experimental study, to have an idea of what's to be expected from the population.

An experimental study or experiment is one where the investigator intervenes by defining the variable of interest and artificially manipulates the study factor. It is also one of its characteristics the randomization of cases or subjects in groups (two or more, depending on what is the hypothesis of study).

This is an example of a double-blind experiment, in which neither the experimental subjects (volunteers students) nor the researcher (physician). Aside from the fact that the subjects were controlled to make sure they followed the assigned treatment, no other factors were controlled (sleeping habits, eating habits, previous medical conditions)

Still, there is enough intervention to classify it as an experimental study.

b)

You have calculated the probability of randomly selecting a student that contracted the flu. There is no specification about the group the student belongs, you have to calculate the probability of the total of students that contracted the flu.

Let F represent the event that "the student contracted the flu", you can calculate the probability as:

P(F)= \frac{total students that contracted the flu}{total students that participated in the trial}= \frac{633}{808}= 0.78

c)

In this case, you have to calculate the probability that the student contracted the flu, given that he was assigned to the "Vitamin C" group.

This is a conditional probability since you already know that the student was from the "Vitamin C" group (Symbolized V), instead of calculating the probability using the size of the total of volunteers, you'll use the total of students assigned to that group:

P(F/V)= \frac{Students that contracted the flu and took Vitamin C}{Total of students that took Vitamin C}= \frac{302}{403} = 0.75

d)

Two events are independent when the occurrence of one of them doesn't modify the probability of occurrence of the other one. In this case, we have the events F: "The student contracted the Flu" and V: "The student took vitamin C" if F and V are independent the probability of F should stay the same even whether or not he has taken vitamin C:

P(F)=P(F/V)

But as calculated in items b. and c. these probabilities are different, meaning that the events are not independent.

e)

The claim of the health expert is that "Vitamin C reduces the occurrence of the flu in the population of volunteer students, i.e. the number of students that contracted the flu given that they took vitamin C will be less than the number of students that contracted the flu given that the took the placebo.

The parameters of the study will be the population proportions of students with the flu that took vitamin C, p₁, and the population proportion of students with the flu that took the placebo, p₂.

H₀: p₁ ≥ p₂

H₁: p₁ < p₂

f)

Let's assume that α: 0.05, using the p-value approach, the decision rule is:

p-value ≤ α, reject the null hypothesis.

p-value > α, do not reject the null hypothesis.

The p-value: 0.0096 is less than α: 0.05, the decision is to reject the null hypothesis. At a 5% significance level, there is significant evidence to reject the null hypothesis, then the population proportion of students that contracted the flu given that they took t vitamin C is less than the proportion of students that contracted the flu given that they took the placebo.  You can conclude that the expert is correct and taking vitamin C reduces the occurrence of the flu among the students.

6 0
3 years ago
____ sounds are anything that stand for an idea<br><br> A. Sounds<br> B. Symbols<br> C. Feelings
Ksenya-84 [330]

Answer:

k Nishant

Explanation:

the correct answer is option C feelings

6 0
3 years ago
Read 2 more answers
I need help on this question please
Delicious77 [7]

Answer:

d i think

Explanation:

7 0
2 years ago
Whats an amphibian specie or plant specie in the us endangered by an invasive specie?
meriva
Frogs is the answer.......... :)
4 0
3 years ago
Suppose R and Q are two events such that P(R)= .14, P(Q) = .52, and P(R∩Q)= .20, find P(RUQ), are the events mutually exclusive
saw5 [17]

Answer:

#

P(R I Q) = P(RnQ) / P(Q) = 0.1 Therefore P(RnQ) = 0.1 X 0.35 = 0.035 (The intersection in the centre of a Venn Diagram)

P(RnQ') = 0.15 In a Venn Diagram this is R but excluding the centre intersection with Q. Therefore P(R) = P(RnQ') + P(RnQ) = 0.15 + 0.035 = 0.185

P(RUQ) = 0.15 + 0.035 + 0.315 = 0.5 so 0.5 must be outside the Venn Diagram circles.

Explanation:

hope this helps

4 0
3 years ago
Other questions:
  • What is it called when a psychology major chooses to focus on forensic psychology
    5·1 answer
  • The deep ocean floor communities contain very little life. In constant darkness, the water at these depths hovers around 2°C . S
    10·1 answer
  • What does denaturing a protein affect?
    11·1 answer
  • All of the activities of 4-H are related to agriculture today.<br> A. <br> True<br> B. <br> False
    15·1 answer
  • 40 POINTS!! Help Asap please.... EARTH &amp; SPACE SCIENCE
    7·1 answer
  • AP WORLD HISTORY: Identify and explain ONE way that Islam demonstrated tolerance and flexibility in ruling their vast empires.
    11·1 answer
  • To what extent is US society one-dimensional?
    10·1 answer
  • Vivi has started hanging out with a new group of friends at school. She is also, though, feeling anxious because her new group o
    15·1 answer
  • Which argument styles does the writer employ in ""The Grant Shapps Affair Is a Testament to Wikipedia's Integrity and Transparen
    11·2 answers
  • The Act Establishing Yellowstone National Park represents a shift in public policy regarding which of the following contentious
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!