Examlex
If the energy of a photon is 1.32 × 10-18 J, what is its wavelength in nm (c = 3.00 × 108 m/s; h = 6.63 × 10-34 J • s) ?
Nonprobability Sampling
A sampling technique where the samples are gathered in a process that does not give all the individuals in the population equal chances of being selected.
Lotteries
Games of chance where winners are selected by drawing lots, often used as a means of raising funds.
Stratified Random Sampling
A sampling technique that divides the population into distinct subgroups, or strata, and randomly selects samples from each stratum.
Standard Error
A measure of the variability or dispersion of a sample statistic, such as the sample mean, from the population mean.
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