Step 1: set up hypotheses and determine the level of significance
step 2: select the appropriate test statistic
step 3: set up the decision rule
step 4: compute the test statistic
step 5: conclusion (reject Ho or do not reject Ho; also state the conclusion in the context of the problem i.e. " We have statistically significant evidence to show that...)
Here are the steps with some elements missing:
In Excel file, show how the sample proportion is calculated: p hat = 482/3536. The known poportion is po = 0.211 (historical control; prevalence of smoking among American adults).
step 1: hypotheses are:
Ho: p = 0.211
H1: p < 0.211
alpha = 0.05
Number of Smokers 482
Sample Proportion 0.136312
Population Proportion 0.211© BrainMass Inc. brainmass.com December 24, 2021, 8:45 pm ad1c9bdddf
The expert examines biostatistics. Excel is used as a tool. A complete, neat and step-by-step solution is provided in the attached file.