Chapter 2 Study Guide MULTIPLE CHOICE QUESTIONS 1. The relative frequency of a class is computed by a. dividing the midpoint of the class by the sample size b. dividing the frequency of the class by the midpoint c. dividing the sample size by the frequency of the class d. dividing the frequency of the class by the sample size Answer: d 3. The sum of frequencies for all classes will always equal a. 1 b. the number of elements in a data set c. the number of classes d. a
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the radio waves which can be both microwaves and longer radio waves. These are transmitted in two ways: amplitude modulation (AM ) and frequency modulation ( FM ). These two kinds of wave have many differences. Radio waves are among the many types of electromagnetic waves that travel within the electromagnetic spectrum. Radio waves can be defined by their frequency (in hertz‚ after Heinich Hertz ‚ who first produced radio waves electronically)‚ which is number of times they pass through a complete
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there are 30 students in a classroom and that they have a grade point average listed in the following table. Construct a frequency distribution table that summarizes the data into 6 classes. Calculate relative frequency and percent frequency for each class and use a graphing technique to chart your data. What type of chart would you use to present the frequency and percent frequency for this data? Student GPAs: 1.2 3.9 1.9 3.8 2.4 2.7 2.3 2.3 2.6 0.7 3.1 3.7
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Application Note: CNT-91 + TimeView™ ABCs of Modulation Domain Analysis Background An instrument like an Oscilloscope lets you view voltage variations over time. A Spectrum Analyzer lets you view voltage variations over frequency. A Modulation Domain Analyzer (MDA) lets you view frequency variations over time. Figure 1 shows all three dimensions pictorially. To analyze all dynamic properties of a signal‚ all three of these tools are required: Oscilloscope (v vs. t) Spectrum Analyzer (v vs. f) Modulation
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Automatic Frequency Planning and Optimization Algorithm for Cellular Networks Muhammad Umair‚ Waleed Bin Shahid‚ Masab Javed Abbasi‚ Department of Electrical Engineering Royal Institute of Technology (KTH) SE100-44 Stockholm‚ SWEDEN E-mail: mumair@kth.se‚ waleed.shahid@mcs.edu.pk ‚ masab.abbasi-pc@telenor.com.pk Abstract— Frequency planning in ever growing cellular networks is an extremely arduous task. Any effort to lay down manual frequency plans promulgates inefficiency in the cellular
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PULSE MODULATION TECHNIQUES INTRODUCTION • Modulation is the process of frequency translation in which any one parameter(Amplitude‚ frequency or phase) of high frequency carrier signal is varied in accordance with instantaneous value of low frequency modulating signal. • Modulation is either analog or digital. INTRODUCTION • Many signals in modern communication systems are digital • Additionally‚ analog signals are transmitted digitally • Digitizing a signal results in reduced distortion
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Chapter 2 Chapter Notes FREQUENCY TABLE A grouping of qualitative data into mutually exclusive classes showing the number of observations in each class. You can convert class frequencies to relative class frequencies to show the fraction of the total number of observations in each class. BAR CHART A graph in which the classes are reported on the horizontal axis and the class frequencies on the vertical axis. The class frequencies are proportional to the heights of the bars. The most
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of chapter 2 is for you to master several techniques for summarizing and depicting data‚ thereby enabling you to: 1. Recognize the difference between grouped and ungrouped data. 2. Construct a frequency distribution. 3. Construct a histogram‚ a frequency polygon‚ an ogive‚ a pie chart‚ a stem and leaf plot‚ a Pareto chart‚ and a scatter plot. CHAPTER TEACHING STRATEGY Chapter 1 brought to the attention of students the wide variety and amount of
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QUESTIONS 1. A frequency distribution is a tabular summary of data showing the a. fraction of items in several classes b. percentage of items in several classes c. relative percentage of items in several classes d. number of items in several classes Answer: d 2. A frequency distribution is a. a tabular summary of a set of data showing the relative frequency b. a graphical form of representing data c. a tabular summary of a set of data showing the frequency of items in each of
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Therefore‚ it is an interval scale variable. 4. The number of people eating at a local café between noon and 2:00 p.m. is an example of a discrete variable. TRUE Chapter25. When establishing the classes for a frequency table it is generally agreed that the more classes you use the better your frequency table will be. FALSE We try to follow the 2k rule. Having too many classes is not good.6. The cumulative distribution function is never decreasing. TRUE It is always increasing and becomes flat at the end
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