Question
A systematic sample does not yield good result, if
-Solution
a 1 in x systematic random sample is obtained by randomly selecting one of the first "x" units in the sampling frame and then selecting every subsequent xth unit Its generally used in a continuous process. First observation is chosen randomly and then other observations are picked by adding some constant "c" to the successive observations. c = N/n where N = size of population and n = size of sample It's important to check that the data is not having a periodic property. (Foe eg. If sales are analysed and x is taken as 7, then sample will include the sales on the same day of every week)
Name of the insect Order in which (in general), the larval stage is phytophagous and adults are nectar feeder/sap suckers:
The bulk density of sandy soil is about 1.6 g/cc. what is the approximate value of bulk density for organic matter
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