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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Kindly answer items 1, 2, 3 and 4 and determine whether the numerical value is parameter or a statistic ( explain why it is so). The needed data is given. Thank you.

Transcribed Image Text:Directions: Determine whether the numerical value is a parameter or a statistic. Explain
your answer.
1. Sixty-two of the 97 passengers aboard the Agila airship survived its explosion.
2. In a survey of 300 computer users, 8% said their computers had malfunctions that
needed to be repaired by service technicians.
3. A survey of 1004 Filipino adults found that 52% think that China's emergence as a
world
power
is a major threat to the well-being of the Philippines.
4. In January 2013, 60% of the governors of the Philippines were male.

Transcribed Image Text:A parameteris a value that describes some aspect of a population. A parameter
may be very difficult to determine if not impossible, especially in a large population. This
is where samples and statistics come into play.
However, a parameter can be determined in a very small population where every
individual can be located with absolute certainty, for instance in a totally captive
population. In this case you can calculate a parameter directly if all individuals can be
located and measured without missing a single individual.
A statistic is a value that is an estimate of a parameter. A statistic is based on
a sample. It is calculated from a sample taken from a population.
Sampling is a way to collect information or data about a population without
actually counting or measuring every individual in the population. Sampling is often
necessary since it is often impossible to measure or count every individual within a
population since populations are often large and it may be hard to find every individual.
Table comparing the difference between Parameter and Statistic
PARAMETER
STATISTIC
Descriptive measure of a sample
Estimate of a value in the population
Always possible to measure
Descriptive measure of a population
Actual value in the population
Not always possible to measure
Parameter average or mean is
indicated with u
Statistic average or mean is indicated by x
The variance is indicated by o²
The variance is indicated by s?
Standard deviation is indicated by o
Standard deviation is indicated by s
Total size of population is indicated by N
Total size of sample is indicated by n
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