An electrician cuts always a 7.2inch long section of drywall to make repairs to the electrical system. he has several scraps of drywall he can use to repair the hole. whats the lengths of drywall that is large enough to repair the hole?
answers can be
7 2/3. 7 3/4. 7 5/21

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?