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MAT 155 Chapter 1 The following is a brief review of Chapter 1. This does NOT cover all the material in that chapter. Click on Slide Show and View Slide Show. Read and note your answer to the question. Advance the slide to see the answer. Thanks to Ms. Valerie Melvin for her portion of this review. Dr. Claude Moore, Math Instructor, CFCC

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**The population is A collection of observations.**

A collection of methods for planning studies and experiments. The complete collection of all elements. A subcollection of members drawn from a larger group.

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**A self-selected study is a source of bias in which factor of statistical analysis?**

Source of data. Context of the data. Mathematical calculations. Sampling method.

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**Which is an example of quantitative data?**

Weights of high school students. Genders of actors and actresses. Colors of the rainbow. Consumer ratings of a particular automobile (below average, average and above average).

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**Which is not an example of continuous data?**

Temperature on a thermometer. Number of students in an algebra class. Mean weight of 100 flour sacks. Amount of water pumped from a pond per day.

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Questions on a survey are scored with integers 1 thru 5 with 1 representing Strongly Disagree and 5 Strongly Agree. This is an example of what kind of measurement? Nominal. Ratio. Ordinal. Interval.

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In a large lecture room class of 300 students, a sample of 10 was taken to determine the male/female make up of the class. Which misuse of statistics does this represent? Percentages. Precise numbers. Missing data. Small samples.

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At a security checkpoint to a government facility, every 10th individual was more thoroughly searched than the others. What type of sampling is this? Systematic. Convenience. Stratified. Cluster.

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A sample of households is selected and the average (mean) number of people per household is 2.58 (based on data from the U.S. Census Bureau. Parameter Statistic

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**The mean weight of pennies currently being minted is 2.5 grams.**

Discrete data Continuous data

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**Fifty letters were sent as part of an experiment, three of them arrived at the target address.**

Discrete data Continuous data

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**Numbers on the shirts of marathon runners.**

Nominal Ordinal Interval Ratio

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**Salaries of women who are chief executive officers of corporations.**

Nominal Ordinal Interval Ratio

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**The current temperature in the 50 state capitol cities.**

Nominal Ordinal Interval Ratio

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Casualty data from the great flu epidemic of 1918 were collected for study. This represents what type of study? Cross-sectional Retrospective Prospective Qualitative

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