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Data collection instruments refer to a method such as questionnaires to gather information from respondents about variables such attitudes, knowledge, beliefs and feelings.

  1. There are two important factors the researcher should consider when utilizing a research tool in his or her research? Provide a brief description about these factors and its type?
  2. A measure can be reliable but not valid. Likewise, a measure can be valid but not reliable? Provide your explanation?

question 2

  1. What is sample size determination and what criteria the researcher should use to estimate to or calculate sample size?

question 3


1- The researcher should really understand the different levels of measurement as these measurement levels decides the statistical test type to be used. Please indicate what are the level of measurement and provide definition and brief Explanation and why they are important?

question 4


Which sampling procedures (Probability or nonprobability) is ideal method to use for research studies. Please response to each other