Which supermarket has the lowest prices in town? All claim to be cheapest, but an independent agency recently was asked to investigate this question. The agency randomly selected 100 items common to each of two supermarkets (labelled A and B for confidentiality) and recorded the prices charged by each supermarket. The summary results are provided below: xA = 2.09  xB = 1.99  d = .10 sA = 0.22 sB = 0.19 sd = .03 Suppose the 95% confidence interval turned out to be (-.12, .02). Which of the following interpretations is correct? Select one: A. We are 95% confident that μA equals μB. B. None of these interpretations is correct. C. We are 95% confident that μA is larger than μB. D. We are 95% confident that μB is larger than μA.

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A researcher thinks that watching violent televisions increases aggressive behavior in children. To test this hypothesis, she randomly assigns 48 children into one of 3 groups (no violent TV, a little violent TV, or a lot of violent TV) and observes their playground behavior for three weeks and measures it for violence and intensity. For the variable “amount of TV” (as it appears in this problem), what is the scale of measurement? a. nominal b. ordinal c. interval d. ratio   A researcher thinks that watching violent televisions increases aggressive behavior in children. To test this hypothesis, she randomly assigns 48 children into one of 3 groups (no violent TV, a little violent TV, or a lot of violent TV) and observes their playground behavior for three weeks and measures it for violence and intensity. If the researcher’s hypothesis is correct, which of the following conclusions could be drawn? a. Fail to reject the null, watching violent TV does not increase…

The Sea Wharf Restaurant would like to determine the best way to allocate a monthly advertising budget of $1,000 between newspaper advertising and radio advertising. Management decided that at least 25% of the budget must be spent on each type of media and that the amount of money spent on local newspaper advertising must be at least two and a half times the amount spent on radio advertising. A marketing consultant developed an index that measures audience exposure per dollar of advertising on a scale from 0 to 100, with higher values implying greater audience exposure. If the value of the index for local newspaper advertising is 50 and the value of the index for spot radio advertising is 80, how should the restaurant allocate its advertising budget to maximize the value of total audience exposure? (a) Formulate a linear programming model that can be used to determine how the restaurant should allocate its advertising budget in order to maximize the value of total audience exposure. If…