Lesson 2: Sample Size

Question 1

is the portion or subset of a population required to ensure that there is sufficient information to generalize the finding of the research.

Answer 1

Sample Size, According to Sekaran and Bougie (2010)

Question 2

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

Answer 2

According to Barlett et. al. (2001)
- A. SELECTING THE ALPHA VALUE

Question 3

say that for continuous data, a margin of error of 3% is acceptable while the categorical data is ±5.

Answer 3

• Krejcie and Morgan (1970)
- B. THE ACCEPTABLE MARGIN OF ERROR OF MEAN BEING ESTIMATED

Question 4

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%.

Answer 4

• Krejcie and Morgan (1970)
- C. THE ESTIMATE OF VARIANCE OF POPULATION