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Q. A ………………….. is a device that is most frequently used in collecting primary data.

Q. Mode is the …………….and it is not affected by the values of extreme items.

Q. …………research seeks to explain what is happening in a particular situation.

Q. It is a special non-probability method used when the desired sample characteristic is rare, which sampling

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Q. Suppose that a population with N = 200 has µ = 30. What is the mean of the sampling distribution of the mean for sample of size 40?

Q. The test of reliability is an important test of sound measurement. The methods to evaluate reliability of scales are:

Q. Where the sample size is less than 30 ….is used.