WHAT IS RELIABILITY IN STATISTICS
What is reliability in statistics with example in SPSS What is reliability ? Extent to which results are consistent Validity is the extent to which the instrument measures what it claims to measure. A good measurement instrument is both reliable and valid. Reliability is a prerequisite for validity. Ways to measure Reliability: Test – Retest Parallel forms Split-half method Internal consistency Interpreting Test – Retest and Parallel Forms Reliability: Measured with correlation coefficient between halves or between tests. Generally an range of 7-8 is considered good reliability, but it depends on what else is available. Split – half Method: A method of determining the reliability of a test by dividing the whole test into two halves and scoring the two halves separately. Inter – rater reliability: I...