Colby and sarah sold newspapers this past summer. colby earned $4.50 for each newspaper he sold. sarah's earnings were $35 less than colby's at the end of the summer. the following expression shows sarah's earnings: 4.50y − 35 in the expression, what does the variable y represent?

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?