A hydrocarbon of unknown formula CxHy was submitted to combustion analysis with the following results.What is the empirical formula of the hydrocarbon? 
Definitions:
Confidence Interval
A collection of numbers, sourced from sample data, presumed to contain the value of an undiscovered population characteristic.
Population Variance
The variance of a population data set, calculating the mean of the squared deviations from the mean of the data.
Confidence Interval
A range of values, derived from the sample data, that is likely to contain the value of an unknown population parameter.
Sample Variance
A measure of variability that quantifies the spread of a sample data set; calculated as the sum of squared deviations from the sample mean, divided by the sample size minus one.
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