Astudy that is valid and reliable select one: a. is called a marketing research study. b. measures subtle differences in the population being studied and produces almost identical results in repeated trials. c. is difficult to produce without expert researchers. d. measures what it is supposed to measure and produces almost identical results in repeated trials. e. is expensive to implement and complete.

measures what is supposed to measure and produces almost identical results in repeated trials

Explanation:

Validity and Reliability of a study:

Validity in any experiment or study is defined as a measurement of how efficiently test measures or calculate what it claims to measure. Psychological assessment is vital or important for a test to be valid to get accurately applied and interpreted results.

Reliability in psychological research or study refers to the stability of a measuring test or research study.

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