What

Part 1. Basic Concepts of Statistics

Basic Concepts of Statistics
Every four years, we come through an
affliction,
affliction, the presidential election.
Months before the election, public media will
inform us that a poll conducted by the opinion
research shows that a scene gains support
of
of more than 50 percent of voters.

1

Basic Concepts of Statistics

2

Testing Hypotheses: One-sample tests

However, the blue percent of support will be
with
with a margin of actus reus of plus or minus 3%.
What is meant by the margin margin of error?
If you have an ambition to become president,
you get to know something nearly statistics.
If you cannot perform statistics yourself, it
would be better to train a statistician right
away.

One-sample tests
trifling meditation:
Ho: ? ?0

resource hypothesis:
Ha: ? ?0

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What is a Hypothesis?

The Null Hypothesis, H0

A hypothesis is a charter
(assumption) about a
cosmos parameter:

States the claim or assertion to be tested
simulation: The average human body of TV sets in U.S.




Homes is equal to three (H0 : µ = 3 )

population mean

Is always about a population parameter,
not about a sample statistic

Example: The mean monthly cellphone phone bill in this
city
city is ? = $42

population proportion

H0 : µ = 3

Example: The proportion of adults in this city with
cell phones is ? = 0.68

H0 : X = 3

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The Null Hypothesis, H0

6

The Alternative Hypothesis, H1
(continued)

Is the opposite of the null hypothesis

Begin with the assumption that the null
hypothesis
hypothesis is true
Similar to the notion of innocent until
proven guilty

e.g., The average be of TV sets in U.S.
homes is not equal to 3 ( H1: ? ? 3 )






Refers to the status quo or historical value
Always contains = , ? or ? sign
whitethorn or may not be rejected
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Challenges the status quo
never contains the = , ? or...If you want to get a full essay, order it on our website: Orderessay



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