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Homework Assignment: Basic Statistics Concepts - Prof. Morris Okun, Assignments of Statistics

Arizona State University (ASU) - TempeStatistics
Prof. Morris Okun

A homework assignment that covers basic statistics concepts, including identifying constants and variables, working with samples and populations, calculating statistics and parameters, and constructing frequency distributions. Students are asked to answer multiple choice questions and provide explanations.

Typology: Assignments

Pre 2010

Uploaded on 09/02/2009

koofers-user-28h
koofers-user-28h 🇺🇸

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Okun NAME:_________________________
Homework Assignment #1: Basic Terms and Frequency Distributions
1 [C]. A researcher is interested in studying the cholesterol
levels of adults who have lived their whole lives in Japan.
Is country of origin a constant or a variable?
_______________
Explanation:____________________________________________________
Is cholesterol level a constant or a variable?
________________
Explanation:____________________________________________________
2A [C]. A researcher gathers data on preference for various
leisure activities by a survey of all residents of a retirement
community. The researcher uses these data to make a statement
about the proportion of residents of this retirement community
who desire various leisure activities. Is the researcher working
with a sample or a population?____________________
Explanation:____________________________________________________
2B [C]. A researcher gathers data by examining every 50th death
certificate recorded in the United States and uses these data to
make a statement about the proportion of people in the United
States who die from various causes. Is the researcher working
with a sample or a population?____________________
Explanation:____________________________________________________
3A [C]. In Question 2A, does the proportion of residents of the
retirement community that want to play golf constitute a
statistic (p) or a parameter ()? _____________
Explanation:____________________________________________________
3B [C]. In Question 2B, does the proportion of deaths due to
cancer calculated from the records that were examined constitute
a statistic (p) or a parameter ()? _____________
Explanation:____________________________________________________
4A [C]. Will the researcher in Question 2A need to use
inferential statistics?_________________
Explanation:____________________________________________________
4B [C]. Will the researcher in Question 2B need to use
inferential statistics?_________________
Explanation:____________________________________________________
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Okun NAME:_________________________ Homework Assignment #1: Basic Terms and Frequency Distributions 1 [C]. A researcher is interested in studying the cholesterol levels of adults who have lived their whole lives in Japan. Is country of origin a constant or a variable?

Explanation:____________________________________________________ Is cholesterol level a constant or a variable?

Explanation:____________________________________________________ 2A [C]. A researcher gathers data on preference for various leisure activities by a survey of all residents of a retirement community. The researcher uses these data to make a statement about the proportion of residents of this retirement community who desire various leisure activities. Is the researcher working with a sample or a population?____________________ Explanation:____________________________________________________ 2B [C]. A researcher gathers data by examining every 50th death certificate recorded in the United States and uses these data to make a statement about the proportion of people in the United States who die from various causes. Is the researcher working with a sample or a population?____________________ Explanation:____________________________________________________ 3A [C]. In Question 2A, does the proportion of residents of the retirement community that want to play golf constitute a statistic (p) or a parameter ()? _____________ Explanation:____________________________________________________ 3B [C]. In Question 2B, does the proportion of deaths due to cancer calculated from the records that were examined constitute a statistic (p) or a parameter ()? _____________ Explanation:____________________________________________________ 4A [C]. Will the researcher in Question 2A need to use inferential statistics?_________________ Explanation:____________________________________________________ 4B [C]. Will the researcher in Question 2B need to use inferential statistics?_________________ Explanation:____________________________________________________

5 [C]. Indicate whether each of the following variables is qualitative-unordered,qualitative-ordered,quantitative-amount or quantitative-count. Furthermore, provide a brief explanation for your answer. A. Blood type:_________________ Explanation:____________________________________________________ B. Course grade:______________ Explanation:____________________________________________________ C. Diastolic blood pressure: __________________________________ D. Number of days absent from work in 1 year:__________________ Explanation:____________________________________________________ 6 [C]. What 4 mistakes were made in constructing the following frequency distribution for the weights of 40 children? Class Interval f

38-42 1

33-37 2

29-33 4

23-28 5

18-22 8

13-17 10

8-12 11

Mistake #1:__________________________________________________ Mistake #2:__________________________________________________ Mistake #3:__________________________________________________ Mistake #4:__________________________________________________

8 [C]. Below are the weights recorded for a sample of teenagers who went to see their family physician. Construct (a) a grouped frequency distribution; and (b) a cumulative frequency distribution for these data. 148 137 108 117 113 145 142 129 150 133 141 140 134 130 139 138 142 144 132 131 135 140 136 142 130 133 141 146 129 139

Class Interval F Cumulative F

  1. [C] Five students are enrolled in an advanced course in psychology. Two quizzes are given early in the semester, each worth a total of ten points. The results are as follows: Student Quiz #1 (X) Quiz #2 (Y) 5 0 2 4 2 6 3 1 7 2 3 6 1 4 9 Show your work in computing each of the following: X = Y = (X)^2 = (Y)^2 = X^2 = Y^2 = XY = X Y = 5 4 Xi = Yi = i=3 i=