Score: 0.33 of 1 pt 47 of 11 (11 complete) Hw Score: 79.09%, 8.7 of 11 ; 7.3.16

Question

Score: 0.33 of 1 pt 47 of 11 (11 complete) Hw Score: 79.09%, 8.7 of 11 ; 7.3.16 Question Help In a sample of seven cars, each car was tested for nitrogen-oxide emissions (in grams per mile) and the following results were obtained: 0.15, 0.05, 0.19, 0.07, 0.12, 0.14 0.09 Assuming that this sample is representative of the cars in use, construct a 98% confidence interval estimate of the mean amount of n ogen ude emissions for all cars. If the EPA requires that nitrogen-oxide emissions be less than 0.165 g/mi, can we safely conclude that this requirement is being met? Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table What is the confidence interval estimate of the mean amount of nitrogen-oxide emissions for all cars? (Round to three decimal places as needed.) Enter your answer in the edit fields and then click Check Answer. part Clear All Check Answer ??

Explanation / Answer

The statistical software output for this problem is:

One sample T confidence interval:
? : Mean of variable

98% confidence interval results:

Hence,

98% confidence interval will be:

0.058 g/mi < ? < 0.174 g/mi

Variable Sample Mean Std. Err. DF L. Limit U. Limit Data 0.11571429 0.018498023 6 0.057581133 0.17384744

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