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In a sample of 7 cars each car was tested for nitrogen-oxide emmissions (in grams per mile) and the following results were obtained. .07 .11 .17 .18 .17 .19 .16 Assuming that this sample is representative of the cars in use, construct a confidence interval estimate of the mean amount of nitrogen-oxide emmissions for all cars. If the EPA requires that nitrogen-oxide emmissions be less than .165 g/mi, can we safely say this requirement is being met?
A. what is the estimated mean
__________ g/mi < u < _______g/mi
B. can we safely conclude that the requirement that nitrogen-oxide emmissions be less than .165 g is being met?
Construct a scatterplot and identify the mathematical model that best fits the given data. Assume that the model is to be used only for the scope of the given gata, and consider only linear, polynomial (degree 2) logarithmic, exponential, and powe..
For a random sample of 50 batteries, what is the probability that the sample mean will be less than 27.5 hours?
Then comment on the effectiveness of the presentation: Were the frequency distributions used effectively to report the results? Why or why not?
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A test statistic is computed from sample data in hypothesis testing and is used in making a decision about whether or not to reject the null hypothesis. True or False
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
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