# statistics

## Project Description:

obtain a firm understanding about basic concepts of statistics and numerical descriptive measures (department learning goal 2 objective 2.1.1.)
(2) develop tables and charts by using microsoft excel for presenting and describing business data. (department learning goal 2 objective 2.1.2.)

the table below shows the questions related to the above objectives.
question objective
1 (1)
2 (1)
3 (1)
4 (1)
5 (2)

question 1: the universe or "totality of items or things" under consideration is called
a) a sample.
b) a population.
c) a parameter.
d) a statistic.

question 2: a summary measure that is computed to describe a characteristic from only a sample of the population is called
a) a parameter.
b) a census.
c) a statistic.
d) the scientific method.

question 3: which of the following is not a measure of central tendency?
a) the arithmetic mean
b) the geometric mean
c) the mode
d) the interquartile range

question 4: health care issues are receiving much attention in both academic and political arenas. a sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for medicaid and have no private health insurance. the ages of 25 uninsured senior citizens were as follows:
60 61 62 63 64 65 66 68 68 69 70 73 73
74 75 76 76 81 81 82 86 87 89 90 92
referring to the above table, answer the following questions.
(1) calculate the arithmetic mean age of the uninsured senior citizens to the nearest hundredth of a year.
(2) identify the median age of the uninsured senior citizens.
(3) identify the range of the ages of the uninsured senior citizens.
(4) calculate the standard deviation of the ages of the uninsured senior citizens correct to the nearest hundredth of a year.

question 5: a categorical variable has three categories with the following percentages of occurrence:
category percentage
a 26%
b 56%
c 18%
(1) use excel to construct a bar chart.
(2) use excel to construct a pie chart.
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