Podcast
Questions and Answers
What are the class boundaries, midpoints, and widths for the class 43 - 47?
Boundaries: 42.5 - 47.5, Midpoint: 45, Width: 5
What are the class boundaries, midpoints, and widths for the class 125 - 131?
Boundaries: 124.5 - 131.5, Midpoint: 128, Width: 7
What are the class boundaries, midpoints, and widths for the class 8.24 - 11.36?
Boundaries: 8.235 - 11.365, Midpoint: 9.8, Width: 3.13
What are the class boundaries, midpoints, and widths for the class 16.3 - 18.5?
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The percentages of people surveyed about the JFK assassination adding up to 101% indicates something suspicious.
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What is the reason for the incorrectly constructed frequency distribution with class limits 10-19 to 46-51?
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What is the issue with the frequency distribution where the class limits range from 5-9 to 20-24?
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What is the issue with the frequency distribution from 162-164 to 177-179?
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What is the issue with the frequency distribution where class limits range from 9-13 to 29-32?
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What percentage of people refused insurance for their smartphones?
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According to the pie chart for spending of college freshmen, which category has the second largest piece?
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Study Notes
Class Boundaries, Midpoints, and Widths
- Class a: Range 43 - 47 results in boundaries 42.5 - 47.5, midpoint 45, and width 5.
- Class b: Range 125 - 131 gives boundaries 124.5 - 131.5, midpoint 128, and width 7.
- Class c: Range 8.24 - 11.36 has boundaries 8.235 - 11.365, midpoint 9.8, and width 3.13.
- Class d: Range 16.3 - 18.5 provides boundaries 16.25 - 18.55, midpoint 17.4, and width 2.3.
JFK Assassination Survey
- Survey results show 73% believe in multiple assailants, 19% disagree, 9% have no opinion.
- Total percentage adds up to 101%, indicating potential rounding error or miscalculation.
Frequency Distributions Issues
- Distribution 1: Classes do not have the same width; example classes with varying widths include 10-19 and 20-29.
- Distribution 2: Classes overlap and widths differ; overlapping class limits found in 5-9 and 9-13.
- Distribution 3: Missing class in the range, specifically between 170 and 174.
- Distribution 4: Varying widths, seen in classes such as 9-13 and 14-19.
Smart Phone Insurance Analysis
- Pie graph required to represent percentage of individuals who purchased insurance for smartphones.
- 37% of respondents refused to buy smart phone insurance at the time of purchase.
College Freshman Spending
- A pie graph constructed from spending data of college freshmen identified dorm items as the second-largest expense at 27%.
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Description
This quiz focuses on finding class boundaries, midpoints, and widths for given class intervals. It provides practical examples to enhance your understanding of statistical concepts related to data classification. Perfect for students in introductory statistics courses.
