O d All of these QUESTION 3 The sample size needed to provide a margin of error

Question

O d All of these QUESTION 3 The sample size needed to provide a margin of error of 3 or less with a 95 probablity when the population standaed deviation equals 11 is O a 52 O b.51 O d 53 QUESTION 4 Which of the followings) is(are) an example(s) of non-probabalistic sampling? o a Stratified sampling O b.Systematic sampling c. Convenience sampling o d Cluster sampling QUESTION 5 ed to be 400 and 16 The standard error of the mear The sample meas and the sample standard was taken trom a large 110 0 Type here to search

Explanation / Answer

1. ME is 3, s is 11, the z value for 95% confidence is 1.96, thus ME=z*s/sqrt(N)

3=1.96*11/sqrt(N)

or N is 51.64 or 52

2. c) convenience sampling

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