Sampling is a statistical method of selecting a predefined number of observations from a larger population to determine the characteristics of and to represent the larger population.
A sampling error is a type of error in statistics that is as a result of a difference between the calculated statistical values of a selected sample and that of the entire population. A sample of a population with an error does not properly represent the statistics of the population.
By the definition of sampling in statistics, sampling error can be eliminated by Increasing the size of the sample taken from the larger population, analogous central limit theorem.
The correct option is "d". Given that L = 0.8T² length of pendulum = 30ft
L= 0.8T² 30 = 0.8T² T² = 30 / 0.8 T² = 37.5 T = √37.5 = 6.1 seconds <span>So, 6.1 is the closest to the period in seconds for a pendulum that is 30 ft long.</span>
