Sample size and location have little impact on costs for ________

To perform the test of significance of differences between two percentages, each representing a separate group (sample), the first step requires:

A) that the arithmetic difference between the two percentages be translated into a number of standard errors away from the hypothesized value of zero B) a comparison of the two percentages C) a computation of z by dividing the difference between the two sample percentages by the standard error of the difference between percents D) determining whether the null hypothesis is supported or not supported at your chosen level of confidence E) reviewing the normal curve

The viability of suppliers is especially important for suppliers who

A) provide mission-critical products that would be easy to replace. B) provide mission-critical products that would be difficult to replace. C) provide non-critical products that would be difficult to replace. D) provide non-critical products that would be easy to replace.