Your human resources department has referred 26 employees for alcohol counseling. While the work habits of 15 improved, 4 actually got worse, and the remaining 7 were unchanged. Use the sign test for the differences to tell whether significantly more people improved than got worse.
Answer to relevant QuestionsUse the data sets from problems 2 and 3, on profit as a percent of sales for building materials firms and for aerospace firms. a. Find the median profit for each industry group and compare them. b. Combine the two data sets ...Why is it much more difficult to establish independence than it is to establish dependence (lack of independence)? a. If an observed count is 3 and the expected count is 8.61, is there any problem with going ahead with a chi-squared test? b. If an observed count is 8 and the expected count is 3.29, is there any problem with going ahead ...For each potential customer entering an auto showroom, the type of vehicle desired is recorded. Table 17.4.1 shows data for the past week, together with percentages for the past year at this time. a. Find the percentages for ...Is there evidence consistent with gender discrimination in training level? To answer this, proceed as follows: a. Create a table of counts for the two qualitative variables “gender” and “training level.” b. Compute ...
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