The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.7 grams per mile and standard deviation 0.15 grams per mile . (a) What sample size is needed so that the...

Have to answer part a and part b with the given choices:
smaller
larger
the same

Extracted text: The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.7 grams per mile and standard deviation 0.15 grams per mile . (a) What sample size is needed so that the standard deviation of the sampling distribution is 0.01 grams per mile ? ANSWER: (b) If a smaller sample is considered, the standard deviation for a would be J. (NOTE: Enter "SMALLER","LARGER" or "THE SAME" without the quotes.)