Lesson 2: Sample Size Flashcards
is the portion or subset of a population required to ensure that there is sufficient information to generalize the finding of the research.
Sample Size, According to Sekaran and Bougie (2010)
an alpha level of 0.05 is acceptable in the majority of research and it represents
a 95% confidence level and a t-critical value of 1.96
According to Barlett et. al. (2001)
- A. SELECTING THE ALPHA VALUE
say that for continuous data, a margin of error of 3% is acceptable while the categorical data is ±5.
• Krejcie and Morgan (1970)
- B. THE ACCEPTABLE MARGIN OF ERROR OF MEAN BEING ESTIMATED
suggested a variability of 50% in the population for the continuous while the categorical data is squaring the population variability (0.05)= 0.25 =n 25%.
• Krejcie and Morgan (1970)
- C. THE ESTIMATE OF VARIANCE OF POPULATION