A service provider decided to split each hexagonal cell of 20 km radius to 7 microcell of appropriate size.
(a) What is the size of each microcell?
(b) How is the signal strength influenced by such a redesign?
(c) What is CCIR compared to the original design, assuming the propagation
path loss slope ? = 4.5.
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What will be an ideal response?
The age of an ancient piece of organic matter can be estimated from the rate at which it emits beta particles as a result of carbon-14 decay. For example, if X is the number of particles emitted in 10 minutes by a 10,000-year-old bone fragment that contains 1 g of carbon, then X has a Poisson distribution with mean ? = 45.62. An archaeologist has found a small bone fragment that contains exactly 1 g of carbon. If t is the unknown age of the bone, in years, the archaeologist will count the number X of particles emitted in 10 minutes and compute an estimated age 
with the formula
Unknown to the archaeologist, the bone is exactly 10,000 years old, so X has a Poisson distribution with
? = 45.62.
a. Generate a simulated sample of 1000 values of X, and their corresponding values of 
.
b. Estimate the mean of .
c. Estimate the standard deviation of .
d. Estimate the probability that will be within 1000 years of the actual age of 10,000 years.
e. Estimate the probability that will be more than 2000 years from the actual age of 10,000 years.
f. Construct a normal probability plot for . Is approximately normally distributed?
Where is the liquid receiver located?
A) On the low side just before the compressor B) On the low side just after the metering device C) On the high side just after the compressor D) On the high side just after the condenser
A vehicle is brought in for repair with the complaint of poor fuel economy. A diagnostic scan tool is attached to the DLC with the vehicle at operating temperature, and the technician determines that the pre-catalyst oxygen sensor voltage is biased high and the injector pulse width is long, and both STFT and LTFT are high. All of the following conditions could cause this EXCEPT:
A. high fuel pressure B. open coolant temperature sensor circuit C. TP sensor voltage fixed high D. MAP sensor output indicates high load condition