Quick Introduction to Biostatistics

Question 1

2 events A and B are independents if

Accepted Answer

P(A | B) = P(A), P(A and B) = P(A)xP(B)

Question 2

In probability, the term "discrete" refer to:

Accepted Answer

countable, infinite, finite

Question 3

What can be the used of an experiment?

Accepted Answer

Evaluation of material properties, Process characterization & optimization, Product design & development

Question 4

What is false about random variables?

Accepted Answer

can be continuous, but not discrete

Question 5

Beside the Descriptive statistics, we have:

Accepted Answer

Inferential statistics, Predictive Statistics

Question 6

in Statistics, what is a population?

Accepted Answer

A collection of object interesting for study

Question 7

Conditional probability is used to

Accepted Answer

analyze the false positive and negative in decision process, check if 2 event are independent., calculate the disease prevalence and sensitivity

Question 8

In statistics, "Age" is usually a

Accepted Answer

discrete variable, quantitative variable

Question 9

What is an Experiment?

Accepted Answer

a test, a series of test

Question 10

This picture describe the sample characteristics

Accepted Answer

Yes

Question 11

For a population sample, what does a statistic mean?

Accepted Answer

Sample size + mean + variance + std deviation, Sample summaries

Question 12

What does this picture represent?

Accepted Answer

the distribution of 2 samples, a common normal distribution, The hypothesis testing framework

Question 13

What is a p-value?

Accepted Answer

Parameter measuring the truthfulness of the null hypothesis, area (probability) in the tails of the t-distribution, risk of wrongly rejecting the null hypothesis of equal means

Question 14

Based on the following test result table, find the mistake (s)

Accepted Answer

False positive = 99, True Negative = 901

Quick Introduction to Biostatistics

Questions 14

Quick Introduction to Biostatistics

Questions 14