A.C. Nielson Case Analysis

Three specific aspects of the sampling process and data collection procedure used by the A. C. Nielsen company are assessed The first aspect assessed in the company's sampling procedure. Sample size, sample selection, sample participation, and sample validity are issues that are assessed. The second aspect assessed is the company's data collection procedures, with a specific focus on the tasks that the company demands be performed by the members of the sample. The implications of the company's demands on the reliability of the data collected are assessed.

The terms "validity" and "reliability" are pertinent to the assessment of the company's sampling process and data collection procedure. The quality of any statistical analysis can be only as good as is the quality of the data upon which it is based; thus, the reliability and validity of data collected for use in statistical analysis is of paramount importance. Validity refers to the extent to which data or a data collection instrument measures what it is actually desired to measure, or the extent to which a sample that claims t

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lded by a previously validated external standard, the reliable instrument is not a valid instrument. Therefore, it can easily be seen that reliability in an instrument is required before that instrument can be considered to be valid, but that reliability in an instrument cannot, alone, guarantee that such instrument will be valid. A validity coefficient is the correlation coefficient between a measuring procedure and an outside or independent measure of the function that the test was designed to measure, while a reliability coefficient is the correlation coefficient between successive measurements using the same instrument. If those who stand high on a test, as an example, stand high on the outside criterion, and those who stand low on the test are low on the outside criterion, the test is valid. Similarly, if successive measurements using the same instrument are identical, the instrument is reliable. As a correlation coefficient, a perfect validity coefficient or a perfect reliability would be +1.00 and a complete absence of validity or reliability would be 0.00. A negative correlation, regardless of how high it was, would not be an indication of the validity or the reliability of an instrument. Sampling Procedure Evaluati
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Some common words found in the essay are:
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Approximate Word count = 1294
Approximate Pages = 5 (250 words per page)