What, if anything, is the most serious problem with the following hypothesis? "Union membership is positively related to employee wages and job security." Select one: a. It is double-barreled b. It lacks directionality c. It is not logically consistent Od. There is no problem with that hypothesis The Public Health Agency of Canada wants to compare the effect of two different advertisements that promote mask wearing on young people's intentions to wear a mask in public. An advertising researcher gathers a representative sample of the target population and randomly assigns half of the participants to watch an amusing advertisement (from New York) featuring actor Paul Rudd. The other half watch an advertisement that focuses on a Canadian 19- year-old's difficult battle with COVID-19. The researcher controls other variables that might influence mask-wearing intentions. Mask- wearing intention scores are compared between the two groups. What research design is this? Select one: a. case study b. true experiment c. opinion poll d. quasi-experiment e. survey research Professor Yao takes a random sample from a well-defined population of interest. Which of the following is true regarding the mean (average) of a variable that Professor Yao calculates? Select one: a. It is a sample statistic that can be used to estimate a population parameter b. It is a sample statistic that can be used to build the sampling frame c. It is a population parameter that can be used to calculate a statistic d. It is a population parameter Gretta calculates the correlation between scores on a perceptions of service responsiveness (PSR) scale and customer "churn" (attrition) to validate the PSR scale. It is hypothesized that the correlation between these two, distinct constructs should be negative and significant, which it is. Gretta is assessing which form of validity evidence for the PSR scale? Select one: a. convergent b. criterion c. discriminant d. test-retest