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What is up sampling and down sampling?
Upsampling is the process of increasing the sampling rate of a signal. For instance, upsampling raster images such as photographs means increasing the resolution of the image.In signal processing, downsampling (or "subsampling") is the process of reducing the sampling rate of a signal. This is usually done to reduce the data rate or the size of the data.
What is the difference between sample size and sampling rate?
Rate refers to frequency, while size refers to the amount. Thus, Sampling Rate is measured in Hertz (number of times per second a sample is taken), and Sampling Size is measured in Bits (number of binary digits of information taken at a single time). Thus, if you Sample at 10 Hz/8 bits, that means you take 8 bits of information, 10 times per second.
What is an electron-microscope?
An electron microscope is a device to be able to see items that are smaller in size than the "sampling rate of light" is in physical size. (The length of a wave of light).
What are the effects of sample size on sampling error?
The sampling error is inversely proportional to the square root of the sample size.
What sampling technique will be the best for the large population size?
Clustered sampling.Clustered sampling.Clustered sampling.Clustered sampling.
Is LTPD sampling plan lot size dependent?
Yes, the LTPD (Lot Tolerance Percent Defective) sampling plan is lot size dependent. The plan specifies the maximum allowable percentage of defective items in a lot that is considered acceptable for acceptance sampling. As the lot size changes, the sample size and acceptance criteria may also be adjusted to ensure that the probability of accepting a lot with a defect rate above the LTPD remains consistent. Thus, the effectiveness of the LTPD plan is influenced by the size of the lot being evaluated.
Why was the PCM sampling time set at 125 microseconds?
The PCM (Pulse Code Modulation) sampling time of 125 microseconds corresponds to a sampling rate of 8 kHz, which is sufficient to capture audio frequencies up to about 3.4 kHz, adhering to the Nyquist theorem. This sampling rate ensures that the essential details of the audio signal are preserved while minimizing data size. Additionally, 125 microseconds is a practical choice for efficient processing and storage in digital communication systems.
Define the four different sampling techniques?
1) Simple random sampling 2) Systematic sampling 3) Stratified sampling 4) Cluster sampling 5) Probability proportional to size sampling 6) Matched random sampling 7) Quota sampling 8) Convenience sampling 9) Line-intercept sampling 10) Panel sampling
What is a sampling ratio?
It is the ratio between the size of the sample and the size of the population.
What happens to the sampling error when the sample size is increased?
It is reduced.
In an SRS of size n what is true about the sampling distributions of p when the sample size n increases?
As n increases the sampling distribution of pˆ (p hat) becomes approximately normal.
Comparing Cells - size and shape relate to what?
The cells size and shape relate to its function.
