A researcher plans to conduct a similar poll on Michigan salaried workers. She is writing up a proposal and would like to include a budget for the sample size needed so she can report a 90% (conservative) confidence interval for the population proportion of all Michigan salaried workers who are "satisfied" with their relations with coworkers with a margin of error of 4%. What is the minimum sample size she could budget for?

The minimum sample size the researcher could budget for is 423.

Step-by-step explanation:

Assume that the proportion of all Michigan salaried workers who are "satisfied" with their relations with coworkers is 50%, i.e. p = 0.50.

The margin of error is computed using the formula:

The margin of error is, MOE = 0.04.

The confidence level is 90%.

The critical value is:

*Use the z table for critical values.

Compute the sample size as follows:

Thus, the minimum sample size the researcher could budget for is 423.

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.