Covariance i.e Cov (X, Y) and standard deviations of different datasets are given. Estimate the correlation coefficients and arrange in increasing order

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In qualitative research, the criterion that parallels internal validity is

Scientific Observations are based on____________. 

Match the LIST—I with LIST-II

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​What type of research explores new facts through the study of the past?​

Which of the following is wrong with regard to longitudinal research studies?
(A) The study population is visited a number of times at regular intervals.
(B) There is no need to visit more than once.
(C) Intervals might be as short as a week or longer than a year.
(D) Intervals must be longer than a year.
(E) Intervals are not fixed, so their length may vary from study to study.

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​If research participants are assessed with a particular questionnaire early in a study, but the researchers change the questions for later assessment so participants can't simply repeat answers, what potential threat to internal validity would be likely in the study?​

Match List - I with List - II.

Which of the following methods would apply to ‘Field Research’?