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Show transcribed image text Organizatio... Cost... Essentia
12th Edition 5th Edition 3rd Editio
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Neeraj Kumar Singh answered this
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5,174 answers
1)
The descriptive statistic methods are used for summarising or
describing a collection of data by describing,
numerically or
graphically what was observed in the sample and the inferential
statistics methods are used
to model the pattern observed in the
data and drawing some inference about the population of
interest.
Hence the descriptive statistic methods are used to communicate
the results of the experiments in terms of
numerical descriptors
such as the central tendency and variability etc. and the
inferential statistic methods
are used to draw some conclusion from
the data such as hypothesis testing, regression analysis (or
correlation analysis), estimation, etc.
2)
A population represents the entire group of
interest (or targeted group) for which we want to make some
conclusion about and since we can not survey the entire population,
a subset of the group is used to
collect the data that represents
the entire population hence a sample is the subset
of the population of
interest from which the data values are
collected.
The parameters are the number that describes the whole
population of interest, e.g. population mean ,
population
standard deviation etc. while
the sample statistics are the number obtained from the
sample
dataset and describes the sample, e.g. sample average ,
sample proportion (p), and sample
standard deviation (s), etc
The population parameters are usually historically known or
obtained from the past data while the sample
statistics are
obtained from the sample data.
3)
Answer:
Variable Type of variable Measurement level
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Cost Quantitative Ratio
Textbook Solutions
Operating System Qualitative Nominal
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Display Size Quantitative Ratio
Battery Life Quantitative Ratio
CPU Manufacturer Qualitative Nominal
Explanation:
Cost
Since the data values are measured in number (quantitative in
nature) and the distance between two
measurements is defined by $1
with zero as a base point, this is a type of quantitative variable
and
measured at a ratio level of measurement.
Operating System
Since the data values are classified into a number of labels
this is a qualitative variable and measured at a
nominal level of
measurement.
Display Size
Since the data values are measured in number (quantitative in
nature) and the distance between two
measurements is defined by
inches with zero as a base point, this is a type of quantitative
variable and
measured at a ratio level of measurement.
Battery Life
Since the data values are measured in number (quantitative in
nature) and the distance between two
measurements is defined by
hours with zero as a base point, this is a type of quantitative
variable and
measured at a ratio level of measurement.
CPU Manufacturer
Since the data values are classified into a number of labels
this is a qualitative variable and measured at a
nominal level of
measurement.
4)
Answer:
Variable Summarization using
Cost mean and standard
deviation
Operating System proportion
Display Size mean and standard
deviation
battery Life mean and standard
deviation
CPU Manufacturer proportion
Explanation:
Cost
The values can be summarize using the mean and standard
deviation of the cost of a tablet manufactured.
Operating System
The values can be summarize using the proportion of each
operating system.
Display Size
The values can be summarize using the mean and standard
deviation of the display size of a tablet
manufactured.
Battery Life
The values can be summarize using the mean and standard
deviation of battery life of a tablet
manufactured.
CPU Manufacturer
The values can be summarize using the proportion of each CPU
manufacturer.
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