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MrMuchimi
3 years ago
15

How does the principle of uniformitarianism help scientists? A. It is applied to explain past geologic events. B. It is used to

explain the taxonomy of plants and animals. C. It describes the water cycle. D. It defines relationships in an ecosystem.
Health
1 answer:
Ne4ueva [31]3 years ago
7 0
The answer would be A
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You are performing a cohort study to look at risk factors for breast cancer in postmenopausal women. If the probability of devel
lapo4ka [179]

Answer:

E(X) = np = 100 *0.05 = 5

So we expect about 5 people with the disease in the random sample.

Explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

The probability mass function for the Binomial distribution is given as:  

P(X)=(nCx)(p)^x (1-p)^{n-x}  

Where (nCx) means combinatory and it's given by this formula:  

nCx=\frac{n!}{(n-x)! x!}  

Solution to the problem

For this case we can assume that our random variable who represent the number of students that develop the disease is distributed on this way X \sim Bin(n=100, p =0.05)

And from definition the expected value is given by:

E(X) = np = 100 *0.05 = 5

And the variance is given by:

Var (X) = np(1-p) = 100*0.05 *(1-0.05) =4.75

And the deviation is given by:

Sd(X) = \sqrt{4.75}= 2.179

So we expect about 5 people with the disease in the random sample.

5 0
4 years ago
College men given injections of epinephrine felt happiest if they were told the injection would produce ________ and if they wer
Zepler [3.9K]

Answer and Explanation:

College men given injections of epinephrine felt happiest if they were told the injection would produce __no effect______ and if they were in the company of a person who was acting __euphoric______.

3 0
3 years ago
What kinds of attitudes and behaviors might you want to shift to improve your communications?
algol [13]

Explanation:

The ability to communicate clearly in speaking and in writing is one of the most valuable professional skills.Communicating effectively relies on credibility, which is undermined by grammar and spelling mistakes, incompleteness, and errors in logic.When sending a message, the communicator must keep in mind the target audience.Key Termsclarity: The state, or measure of being clear, either in appearance, thought or style; lucidity.brevity: The quality of being brief in duration.

The ability to communicate effectively in speech and in writing is one of the most valuable professional skills. Sending messages and information so they are understood as intended and produce the desired effect demands certain technical competencies and interpersonal capabilities. Fortunately, these can be learned and honed through practice.

Communicating effectively relies on credibility. Mistakes in grammar and spelling, incompleteness, and errors in logic can have a negative impact on the audience’s perception of the sender’s credibility. As a result, the communicator’s ability to persuade or otherwise influence the recipient is diminished. Effective ways to learn precise, professional oral and written communication skills include:

having others, such as a supervisor, provide feedback on strengths and weaknesses as a communicator.analyzing the strengths and techniques of excellent communicators.imitating strong communicators.Communicating in the Workplace

When sending a message, communicators must think of the target audience, being sure to use terms and phrases that readers or listeners will understand. For example, texts or e-mails should avoid using abbreviations that the receiver may not recognize. To respect others’ time, communication should aim for brevity and concision without sacrificing clarity and completeness. Using e-mail effectively poses particular challenges. Often, messages are poorly structured, missing specific subject lines, slow in getting to the point, or too long to warrant being read in their entirety.

It can be challenging to strike the right tone or avoid the wrong one in electronic communication. The absence of non-verbal cues, such as tone of voice or body language, means that written communication can be more easily misinterpreted and even cause offense. Consequently, important communications may warrant review by someone who can assess the tone and content and provide feedback.

6 0
3 years ago
Which of the following is not a controllable health factor?
N76 [4]

Answer:

infection

Explanation:

you obviously can control all the other things

7 0
3 years ago
Read 2 more answers
A bag of groceries with mass of 15 kg is lifted to a height of 3 m. What is the potential energy of the bag?​
Oduvanchick [21]

Answer:

Potential energy= 441.299

Explanation:

P.E.=mgh

m=mass

g= gravitational acceleration

h=height

3 0
3 years ago
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