8.27. A survey conducted by USA Today showed that 155 of 300 investors owned some stock. a. What percentage of the surveyed investors owned some stock? 1:). Conduct a test of significance for Ho : p = 0.5 versus HI : p 75 0.5 at the 10% significance level. o A hypothesis test is a five step process: 1. State the hypotheses. 2. Calculate the test statistic (which is essentially a z-score) 3. Determine the pvalue 4. Make a decision (where we side with either H0 or H1). To do this, we will need a significance level. 5. State a conclusion in terms of the problem. One Proportion Hypothesis Test 3. pvalue= normalcdf(E99. 2.166. 0. 1) = 0.0152 4. Decision: 0.0152