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Chapter 1: Problem 2

Qualitative or Quantitative? Identify each variable as quantitative or qualitative: a. Amount of time it takes to assemble a simple puzzle b. Number of students in a first-grade classroom c. Rating of a newly elected politician (excellent, good, fair, poor) d. State in which a person lives

Short Answer

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Question: Determine whether the following variables are qualitative or quantitative: a) Amount of time it takes to assemble a simple puzzle b) Number of students in a first-grade classroom c) Rating of a newly elected politician (excellent, good, fair, poor) d) State in which a person lives Answer: a) Quantitative b) Quantitative c) Qualitative d) Qualitative

Step by step solution

01

Variable a: Amount of time it takes to assemble a simple puzzle

This variable represents an amount of time, which is a measurable quantity. Therefore, this variable is quantitative.
02

Variable b: Number of students in a first-grade classroom

This variable represents the count of students in a classroom, which is a measurable quantity as well. Thus, this variable is quantitative.
03

Variable c: Rating of a newly elected politician (excellent, good, fair, poor)

This variable represents the qualitative assessment of a politician's performance, based on categories like excellent, good, fair, and poor. Since these are not measurable quantities, this variable is qualitative.
04

Variable d: State in which a person lives

This variable represents the category or attribute of a person's residence, in terms of which state they live in. As this is not a measurable quantity, this variable is qualitative.

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Most popular questions from this chapter

Discrete or Continuous? Identify each quantitative variable as discrete or continuous. a. Number of boating accidents along a 50 -mile stretch of the Colorado River b. Time required to complete a questionnaire c. Cost of a head of lettuce d. Number of brothers and sisters you have e. Yield in kilograms of wheat from a 1 -hectare plot in a wheat field

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RBC Counts The red blood cell count of a healthy person was measured on each of 15 days. The number recorded is measured in \(10^{6}\) cells per microliter ( \(\mu \mathrm{L}\) ). $$\begin{array}{lllll}5.4 & 5.2 & 5.0 & 5.2 & 5.5 \\\5.3 & 5.4 & 5.2 & 5.1 & 5.3 \\\5.3 & 4.9 & 5.4 & 5.2 & 5.2\end{array}$$ a. Use an appropriate graph to describe the data. b. Describe the shape and location of the red blood cell counts. c. If the person's red blood cell count is measured today as \(5.7 \times 10^{6} / \mu \mathrm{L},\) would you consider this unusual? What conclusions might you draw?

Consider this set of data: $$\begin{array}{llllll}4.5 & 3.2 & 3.5 & 3.9 & 3.5 & 3.9 \\\4.3 & 4.8 & 3.6 & 3.3 & 4.3 & 4.2 \\\3.9 & 3.7 & 4.3 & 4.4 & 3.4 & 4.2 \\\4.4 & 4.0 & 3.6 & 3.5 & 3.9 & 4.0\end{array}$$ a. Construct a stem and leaf plot by using the leading digit as the stem. b. Construct a stem and leaf plot by using each leading digit twice. Does this technique improve the presentation of the data? Explain.
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