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Running head: STATISTICS QUESTIONS
1. Identify the population and the sample. Be as precise as possible. A survey of 1600
business people found that 76% plan on using Microsoft Windows7 operating system at
1600 is the sample size in the study. It represents the number of people who responded in
the study and thus it is the population size.
There is no population size given here.
2. Does the number 76% in question 1. represent a parameter or a statistic. Justify your
1600 is the sample and 76% of the said sample plan on using windows7. Therefore, 76%
is a representation of the sample and thus it is a statistic. A parameter is usually a
representation of the population.
3. Make an inference based on the results of the survey in question #1.
0.76 is a relatively high number reflecting those who wish to change to windows7.
However, the changes in technology and the need for businesses to keep up with the
change explains the reason for such a high number. Additionally, it is possible that a
change in the sample size may have minimal changes in the percentage due to errors in
calculation and the rounding off of the numbers.
4. Determine which data are qualitative and which data are quantitative. Explain your
reasoning. a. a. The yearly salaries of the employees at a school district.
Quantitative- the salaries are numerals and it is easy to attach a value to the same.
b. The employee numbers of the employees at an accounting firm.
Quantitative- the number of employees are in numerals and thus the data is quantitative.
c. The area codes of a sample of 350 residents of nursing homes.
Quantitative- the sample has a number and the codes are also numbers making it
d. The ages of a sample of 350 residents of nursing home.
Quantitative- the age is a number and thus it has to be quantitative.
e. The answers to a survey of 5000 people about how likely is it that the US will enter a
1930s-like depression. The answers are: Very likely, somewhat likely, not very likely, not
at all likely.
Qualitative- there is the absence of numerical representation. It illustrates the feeling of
the respondents and thus it is qualitative.
f. The IQ index of the students in a statistics class.
Qualitative- it is a representation of something that is hard to attach a value to. Although
it is represented as a number, it is dependent on the quality of answers and so it is
5. What are the levels of measurement of data in question 4? Justi...