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Question: The Trade Show Bureau conducted a survey

The Trade Show Bureau conducted a survey to determine why people go to trade shows. The respondents were asked to rate a series of reasons on a scale from 1 to 5, with 1 representing little importance and 5 representing great importance. One of the reasons suggested was general curiosity. The following responses for 50 people from the computer/electronics industry and 50 people from the food/beverage industry were recorded for general curiosity. Use these data and ( = .01 to determine whether there is a significant difference between people in these two industries on this question. Assume the variance for the computer/electronics population is 1.0188 and the variance for the food/beverage population is 0.9180 and the data are interval in level.
The Trade Show Bureau conducted a survey to determine why people go to trade shows. The respondents were asked to rate a series of reasons on a scale from 1 to 5, with 1 representing little importance and 5 representing great importance. One of the reasons suggested was general curiosity. The following responses for 50 people from the computer/electronics industry and 50 people from the food/beverage industry were recorded for general curiosity. Use these data and ( = .01 to determine whether there is a significant difference between people in these two industries on this question. Assume the variance for the computer/electronics population is 1.0188 and the variance for the food/beverage population is 0.9180 and the data are interval in level.





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> Construct a 90% confidence interval to estimate D from the following sample information. Assume the differences are normally distributed in the population.

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> Use the data given and a 1% level of significance to test the following hypotheses. Assume the differences are normally distributed in the population. H0: D = 0 Ha: D &gt; 0

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> A study was made to compare the costs of supporting a family of four Americans for a year in different foreign cities. The lifestyle of living in the United States on an annual income of $75,000 was the standard against which living in foreign cities was

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> Suppose you want to determine whether the average values for populations 1 and 2 are different, and you randomly gather the following data. Test your conjecture, using a probability of committing a Type I error of .01. Assume the population variances ar

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> Use the data given and the eight-step process to test the following hypotheses. H0: &Icirc;&frac14;1 &acirc;&#136;&#146; &Icirc;&frac14;2 = 0 Ha: &Icirc;&frac14;1 &acirc;&#136;&#146; &Icirc;&frac14;2 Use a 1% level of significance, and assume that x is

> Two processes in a manufacturing line are performed manually: operation A and operation B. A random sample of 50 different assemblies using operation A shows that the sample average time per assembly is 8.05 minutes, with a population standard deviation

> Test the following hypotheses of the difference in population means by using the following data (&Icirc;&plusmn; = .10) and the eight-step process. H0: &Icirc;&frac14;1 &acirc;&#136;&#146; &Icirc;&frac14;2 = 0 Ha: &Icirc;&frac14;1 &acirc;&#136;&#14

> A manufacturing company produces valves in various sizes and shapes. One particular valve plate is supposed to have a tensile strength of 5 pounds per millimeter (lbs/mm). The company tests a random sample of 42 such valve plates from a lot of 650 valve

> According to a study several years ago by the Personal Communications Industry Association, the average cell phone user earns $62,600 per year. Suppose an analyst believes that the average annual earnings of a cell phone user are lower now, and he sets u

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> According to the U.S. Census Bureau, the average American generates 4.4 pounds of garbage per day. Suppose we believe that because of recycling and a greater emphasis on the environment, the figure is now lower. To test this notion, we take a random samp

> Downtime in manufacturing is costly and can result in late deliveries, backlogs, failure to meet orders, and even loss of market share. Suppose a manufacturing plant has been averaging 23 minutes of downtime per day for the past several years, but during

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> The Environmental Protection Agency releases figures on urban air soot in selected cities in the United States. For the city of St. Louis, the EPA claims that the average number of micrograms of suspended particles per cubic meter of air is 82. Suppose S

2.99

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