Suppose the cereal boxes in a factory are supposed to contain 645 grams of cereal. Assume that when the filling line is properly adjusted, the weights of the cereal boxes are normally distributed with a standard deviation of 5 grams. The inspector selects 10 boxes from the line, and determines that their average weight is 648 grams. What would the sampling distribution of the x-bar-values look like? What is the probability of getting an x-bar-value as high as 648 grams? Should the cereal-filling line be adjusted?
Answer to relevant QuestionsSuppose a college claims that its graduates from the business program earn at least $40,000 a year, on average, in the first year after graduation. Assume that the year-after-graduation salaries are normally distributed, ...When Doug Brackett bought Downtown Automotive, the previous owner suggested to him that average daily sales at the shop were $2,000.A random sample of daily sales is available in MyStatLab. Do the sample data suggest that ...A survey of the morning beverage market shows that the primary breakfast beverage of 17% of Americans is milk. A Canadian dairy company believes the figure is higher in Canada. The company contacts a random sample of 500 ...The 2008 MasterIndex™ Report produced for MasterCard indicated that women spend an average of $34.21 on quick trips to the grocery store. This estimate is based on a survey of 1,000 Canadians, and you may assume that half ...An online poll conducted by Ipsos Reid on behalf of Rogers Wireless in May 2009 concluded that "two in ten (17%) of cellphone and smartphone users typically access the Internet on a daily basis from their phone."3 Although ...
Post your question