Concept explainers
In 2014, Congress cut $8.7 billion from the Supplemental Nutrition Assistance Program (SNAP), more commonly referred to as food stamps. The rationale for the decrease is that providing assistance to people will result in the next generation of citizens being more dependent on the government for support. Hoynes (2012) describes a study to evaluate this claim. The study examines 60,782 families over the time period of 1968 to 2009 which is subsequent to the introduction of the Food Stamp Program in 1961. This study examines the impact of a positive and policy-driven change in economic resources available in utero and during childhood on the economic health of individuals in adulthood. The study assembled data linking family background in early childhood to adult health and economic outcomes. The study concluded that the Food Stamp Program has effects decades after initial exposure. Specifically, access to food stamps in childhood leads to a significant reduction in the incidence of metabolic syndrome (obesity, high blood pressure, and diabetes) and, for women, an increase in economic self-sufficiency. Overall, the results suggest substantial internal and external benefits of SNAP.
- a. Identify the population that is of interest to the researchers.
- b. Describe the sample.
- c. What characteristics of the population are of interest to the researchers?
- d. If the sample measurements are used to make inferences about the population characteristics, why is a measure of reliability of the inferences important?
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Chapter 1 Solutions
An Introduction to Statistical Methods and Data Analysis
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- Would you include ros in a final model explaining CEO compensation in terms of firm performance?arrow_forwardMarcia Baker is the new manager of the materials storeroom for Keller Manufacturing. Marcia has been asked to estimate future monthly purchase costs for part​ #696, used in two of Keller​'s products. Marciahas purchase cost and quantity data for the past 9 months as​ follows: Month   Cost of Purchase  Quantity Purchased January    $12,410.            2,730 parts February.   12,880            2,880 March      17,505             4,148 April       15,869             3,761 May        13,170             2,912 June       13,867             3,332 July        15,237             3,644 August     10,061             2,287 September   14,960            3,582  Estimated monthly purchases for this part based on expected demand of the two products for the rest of the year are as​ follows: Month Purchase Quantity Expected October…arrow_forwardDoes the new training program appear to be more effective than the older training program in lowering the weight of its new prospects?arrow_forward
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- Looking at the stock information in figure 2, what would you conclude about the South African MobilePhone sector between 2008 and 2011?arrow_forwardThe Ashland MultiComm Services (AMS) marketing department wants to increase subscriptions for its 3-For-All telephone, cable, and Internet combined service. To ensure that as many trial subscriptions to the 3-For-All service as possible are converted to regular subscriptions, the marketing department works closely with the customer support department to accomplish a smooth initial process for the trial subscription customers. To assist in this effort, the marketing department needs to accurately forecast the monthly total of new regular subscriptions. A team consisting of managers from the marketing and customer support departments was convened to develop a better method of forecasting new subscriptions. Previously, after examining new subscription data for the prior three months, a group of three managers would develop a subjective forecast of the number of new subscriptions. Livia Salvador, who was recently hired by the company to provide expertise in quantitative forecasting…arrow_forward