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CAS MA 115 Study Guide - Final Guide: Frequency Distribution, Standard Deviation, Confounding

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School
Boston University
Department
Mathematics & Statistics
Course
CAS MA 115
Professor
Eric Simmonian

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Document Summary

Determine whether the underlined value is a parameter or a statistic: a study of 2700 college students in the city of pemblington found that 14% had been victims of violent crimes, parameter, statistic. Provide an appropriate response: parking at a large university has become a very big problem. University administrators are interested in determining the average parking time (e. g. the time it takes a student to find a parking spot) of its students. An administrator inconspicuously followed 100 students and carefully recorded their parking times. Identify the sample of interest to the university administration: parking time of a student, parking times of the 100 students, type of car (import or domestic, location of the parking spot. Classify the variable as qualitative or quantitative: the numbers on the shirts of a boy"s football team. Determine whether the quantitative variable is discrete or continuous: the number of goals scored in a hockey game.

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Related Questions

1. Matt, the manager, wants to estimate the mean wait time for customers to check out in his Mini-Market. He randomly selects customers and determines the mean wait time is minutes. Define the following for this exercise:

a) Is the data collected qualitative or quantitative?

b) Variable (x):

c) Population of Interest:

d) Sample:

e) Parameter of Interest and Statistic: Do you expect the parameter and the statistic to be the same value? Explain.

f) Discuss the use of descriptive and inferential statistics in this exercise.

g) Is the variable, x, discrete or continuous?

 

2. Identify the population and sample for the following examples:

The P.E. coach of a middle school interested in the mean height for the graders in the school. He randomly selects graders and measures the height of each.

a) Population:

b) 7thgraders Sample:

c) A community college notices that an increasing number of full-time students are working while attending school. The administration randomly selects 200 students and determines how many hours per week each student works.