1. Assume the resting heart rates for a sample of individuals are normally distributed with a mean of 70 and a standard deviation of 15. Use the 68-95-99 rule to find the following quantities:

a. Percentage of rates less than 70 = 50%

b. Percentage of rates less than 55 = 16%

c. Relative frequency of rates less than 40 = 2.5%

d. Percentage of rates less than 85 = 84%

e. Relative frequency of rates less than 100 = 97.5%

f. Percentage of rates greater than 85 = 16%

g. Percentage of rates greater than 55 = 84%

h. Relative frequency of rates greater than 40 = 97.5%

i. Percentage of rates between 55 and 85 = 68%

j. Percentage of rates between 70 and 100 = 47.5%

2. Here are the results of four of your test:

| | Your score | Mean |Standard Deviation | |Math (out of 100) |70 |80 |3.3 | |QM (out of 20) |20 |18 |3 | |RM (out of 100) |66 |75 |5 | |History (out of 30) |28 |20 |3.5 |

a. Present all four results on a standardized normal curve. Be sure to present the calculations for each test.

...LNB Frequencies and Transponder Frequencies « on: April 01, 2008, 07:44:50 PM »http://www.galaxy-marketing.com/satellite-support-forum1/index.php?topic=39.0 | |
These are LNB types and frequencies:
DSS Circular LNB = 12.2GHz-12.7GHz
Standard FSS Linear LNB = 11.7GHz-12.2GHz
Universal FSS Linear LNB = 10.7GHz-12.7GHz
Keeping the above frequency range in mind, now let's look at the frequency ranges of your transponder. Keep in mind that the transponder frequencies are presented in MHz.
All DISH Network, DirecTV, and BEV satellites on DSS have transpnder frequencies that don't go below 12200MHz and don't go above 12700MHz.
All Ku band FSS satellites within North America have transponder frequencies ranging no less than 11700MHz and no more than 12200MHz. For example, on Galaxy 25, the first Ku band transponder frequency is 11716 MHz and the last TP is 12177 MHz.
Now that you know this, cross reference the transponder frequencies and the LNB Input Frequency. Does this start to make sense a bit more?
Universal LNBs
http://www.topbits.com/lnb.html
LNB (Low Noise Block)
A universal LNB can receive both polarizations and the full range of frequencies in both the Ku and C satellite band.
Some LNBs can receive both polarizations simultaneously (through 2 different connectors), while...

...FREQUENCY DISTRIBUTION
WHAT IT IS Frequency distributions summarize and compress data by grouping it into classes and recording how many data points fall into each class. That is, they show how many observations on a given variable have a particular attribute. For example, a survey is taken of 50 people's favorite color. The frequency distribution might indicate 15 people selected green, 12 blue, 6 red, 7 yellow, and 10 purple. Converting these raw numbers into percentages would then provide an even more useful description of the data. The frequency distribution is the foundation of descriptive statistics. It is a prerequisite for both the various graphs used to display data and the basic statistics used to describe a data set -- mean, median, mode, variance, standard deviation, and so forth. Note that frequency distributions are generally used to describe both nominal and interval data, though they can describe ordinal data.
WHEN TO USE IT A frequency distribution should be constructed for virtually all data sets. They
are especially useful whenever a broad, easily understood description of data
concentration and spread is needed. Most data provided by third parties are
grouped into a frequency distribution.
Preparation The steps in preparing frequency distributions manually are as follows:
C Collect raw data from entity records, interviews,...

...denotes sample standard deviation
Frequency distribution:
class width = H - L / K
where 2^K > n ,
n is number of observations or frequency.
No. of classes can be between 5 to 15.
Lower limit of first class interval should be less than or equal to lowest observation in data, upper limit of last class interval should be greater than highest observation in data.
Steps in constructing a frequency distribution:
• Gather the sample data
• Arrange the data in an ordered array
• Select the number of classes to be used
• Determine the class width
• Determine the class limits for each class
• Count the number of data values in each class (the class frequencies)
• Summarize the class frequencies in a frequency distribution table
Graphs:
They bring out patterns, emphasize or clarify which are not readily identifiable in tables also provide pictorial check on accuracy of solution.
Histograms:
Series of rectangles having areas that proportional to the frequencies, width is proportional to range of values within the class & proportional height to the number of items falling in the class. Relativefrequency can be represented in true manner. Difference between bar chart & histogram, in histogram rectangles are adjoining can be of different width, whereas bar diagram it is not possible. It is associated with discrete data, shows...

...iPod, the iRiver, and the Magic Star MP3. To summarize the consumer responses with a frequency table, how many classes would the frequency table have?
4. Two thousand frequent Midwestern business travelers are asked which Midwest city they prefer: Indianapolis, Saint Louis, Chicago, or Milwaukee. The results were 100 liked Indianapolis best, 450 liked Saint Louis, 1,300 liked Chicago, and the remainder preferred Milwaukee . Develop afrequency table and a relativefrequency table to summarize this information.
5. Wellstone, Inc., produces and markets replacement covers for cell phones in a variety of colors. The company would like to allocate its production plans to five different colors: bright white, metallic black, magnetic lime tangerine orange, and fusion red. The company set up a kiosk in the Mall of America for several hours and ask randomly selected people which cover color was their favorite:
Bright white 130
Metallic black 104
Tangerine orange 455
Fusion red 286
A. What is the table called?
B. Draw a bar chart in the table.
C. Draw a pie chart.
D. If Wellstone, Inc., plan to produce million cell phone covers, how many of each color should it produce?
11. Wachesaw Manufacturing, Inc., produced the following number of units in the last 16 days.
27, 27, 27, 28, 27, 25, 25, 28
26, 28, 26, 28, 31, 30, 26, 26
the information is to be organized into a...

...07
(a) With the help of neat diagram and waveform explain the operation of 07
envelop detector.
(b) Explain the indirect method of FM generation. (Armstrong method).
07
OR
(a) Draw the circuit diagram of ring modulator using diode and explain its 07
operation.
(b) Explain FM detection using PLL.
Q.4
07
(a) state and prove the following properties of Fourier transform:
(1) Time shifting (2) Frequency shifting
07
(b) An audio signal 15sin2ᴨ (1500t) amplitude modulates a carrier 60 sin2ᴨ 07
(100,000t).
i) Sketch the audio signal.
ii) Sketch the carrier.
iii) Construct the modulated wave.
iv) Determine the modulation index and percentage modulation.
v) What are the frequencies of the audio signal and the carrier?
OR
1
Q.4
(a) Determine the fourier transform of rectangular pulse shown below.
Q.4
(b) A 107.6 MHz carrier is frequency modulated by a 7 KHz sine wave. The 07
resultant FM signal has a frequency deviation of 50 KHz.
i) Find the carrier swing of the FM signal.
07
ii) Determine the highest and lowest frequencies attained by the modulated
signal.
iii) What is the modulation index of the FM wave?
Q.5
Q.5
(a) Write a short note on self-capacitance of a coil.
07
(b) Two resistors of 20 and 50 kΩ are at room temperature. For a bandwidth 07
of 100 kHz, calculate the thermal noise voltage generated by (a) each
resister, (b) the two...

...illustrate trends, etc.
TO ADVOCATE AN ISSUE
TO SHOW THE STATUS OF AN INDICATOR
TO COMPARE INDICATORS
TO DEMONSTRATE CORRELATIONS
TO ILLUSTRATE TRENDS
INFOGRAPHICS USING EXCEL
Frequency Tables and Histograms Charts : create and format charts Conditional Formatting Sparklines Excel Graphics
FREQUENCY DISTRIBUTION
Shows how many observations fall in various categories(bins) Can be represented in a Frequency Table To obtain a Frequency Table for any given data, we must first choose appropriate number of bins Each bin defines a “slot” where some values may fall in There is no set rule for choosing no of bins (good practice is 8 to 15) Need enough categories to get a meaningful distribution, but too many categories will result in few observations per category
A FREQUENCY TABLE OF MARKS OBTAINED
Mark Range (Bins) 1-2 3-4 5-6 7-8 9-10
Frequency
2 15 25 18 5
HISTOGRAM
A histogram is the graphical analog of a frequency table Histograms show the frequency with which various category/bin values appears in the data set (e.g., how many students received marks between 2 and 3) The X-axis of a histogram shows the possible categories and the Y-axis show the frequency
CREATING A HISTOGRAM IN EXCEL
Identify the bins, and define bin range Create Frequency Table and Histogram using Data Analysis tools...

...Frequencies
A sound wave is created as a result of a vibrating object. The object that is vibrating, is the source of the disturbance that moves throughout the medium. The object creating the disturbance could be the vocal cords of a person, the vibrating strings and soundboard on a string instrument, or the vibrating diaphragm of a radio speaker. If an object has the ability to vibrate, then it will produce sound. Almost every object when hit, struck, plucked, strummed, or somehow disturbed, will vibrate. The frequency or frequencies at which an object tends to vibrate when hit, struck, plucked, strummed, or somehow disturbed is known as the natural frequency of the object. If the amplitudes of the vibrations are large enough and if the natural frequency is within the human frequency range, then the vibrating object with produce sound waves that are audible. Every object has a natural frequency or set of natural frequencies at which they vibrate. The quality of the sound being produced by the vibrating object is dependent upon the natural frequencies of the sound waves produced by the object. The actual frequency at which an object will vibrate...

...(VCO) is a circuit that provides a varying output signal (typically of square-wave or triangular-wave form) whose frequency can be adjusted over a range controlled by a dc voltage. An example of a VCO is the 566 IC unit, which contains circuitry to generate both squarewave and triangular-wave signals whose frequency is set by an external resistor and capacitor and then varied by an applied dc voltage. Figure (1) shows that the 566 contains current sources to charge and discharge an external capacitor C1 at a rate set by external resistor R1 and the control dc input voltage. A Schmitttrigger circuit is used to switch the current sources between charging and discharging the capacitor, and the triangular voltage developed across the capacitor and square wave from the Schmitt trigger are provided as outputs through buffer amplifiers.
Fig.(1) A block diagram of 566 IC.
2
A free-running or center-operating frequency, calculated from Eq.(1).
fo ,
can be
V VC 2 fo ) ……………..(1) ( R1 C1 V
With the following practical circuit value restrictions: 1. R1 should be within the range ( 2 K R1 20 K ). 2. VC should be within range ( 3 V VC V ).
4
3. f o should be below 1MHz. 4. V should range between 10 V and 24 V. Example 1:For the circuit shown in Fig.(2), R1 = 10 KΩ and Find: 1. The control voltage VC . 2. The free running-frequency f o .
C1 =820
pF,
Fig.(2) Connection of 566...