fr

9.1) For each of the following tests, state the hypotheses, identify if it is a right-, left-, or two-tailed test and write Type I Error and Type II Error pertaining to the problem. a)A professor of statistics states that the average student spends 3 hours studying for the midterm exam. Ho: μ = 3 vs. Ha: μ ≠ 3 Two-tailed test Type I Error: Concluding the average student doesn’t study 3 hours for midterm when in fact that is false. Type II Error: Not concluding the average student doesn’t

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OBESITY

OBESITY

1.GENERAL CHARACTERISTICS (DEMOGRAPHIC CONDITIONS, SOCIOLOGICAL AND PSYCHOLOGICAL ASPECTS)

Obesity means having too much body fat. It is not the same as being overweight, which means weighing too much. A person may be overweight from extra muscle or water, as well as from having too much fat.Both terms mean that a person’s weight is higher than what is thought to be healthy for his or her height. Obesity is considered to be a major nutritional disorder in many parts of the industrialized world.

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com

1. Television channels are 6 MHz wide. How many bits/sec can be sent if four-level digital signals are used?
“Max. data rate = 2B log 2 V bits/sec”, we can sample = 2 (6MHz) log 2 (4) = 24 million times/sec. four-level signals = 24 Mbps.
2. If a binary signal is sent over a 3-kHz channel whose signal-to-noise ratio is 20 dB, what is the maximum achievable data rate?
S/N = 10^2 = 100. So max data rate = (3000Hz)log2(1+100)bits/sec = 3000 * 6.643 = 19.92kbps
3. When the data-rate in T1 is 1.544
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cs

1.) A group of N stations share a 56-kbps pure ALOHA channel. station outputs a 1000-bit, every 100 sec. maximum value of N?
     usable bandwidth is 0.184 x 56 kbps = 10.3 kbps. N = 10300/10 = 1030 stations.
2.) Consider the delay of pure ALOHA versus slotted ALOHA at low load. Which one is less?
     transmission can start instantly. At low load, no collisions are expected, the transmission will be successful.With slotted ALOHA, it has to wait for the next slot. This introduces half a slot
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ReproductionReproduction is an integral feature of all living beings. The process by which a living being produces its own like is called reproduction.

Importance of Reproduction:Reproduction is important for each species, because this is the only way for a living being to continue its lineage. Apart from being important for a particular individual, reproduction is also important for the whole ecosystem. Reproduction helps in maintaining a proper balance among various biotic constituents of the ecosystem.

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Data items presented in a digital certificate
Serial number,Certificate Authority that issued certificate,CA digital signature,Name of company/organisation/individual owning certificate,Subject public key,Period during which certificate is valid,Hashing algorithm
Conditions message is authentic
Digital certificate,Includes public key,Used to hash message received / produce message digest,Generated hash compared to digital signature
Usage of encrypted message digest
Financial transaction,Legal document,

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