James was trying to sleep one night but there was too much noise around him. His clock ticked every 20
seconds; a tap was dripping every 15 seconds and his
pet dog snored every 27 seconds. He noticed on his
clock that all three events happened together on the
stroke of midnight.
(a) After how many minutes would all the three
events happen together again?
(b) How many times would all three events happen together again between midnight and one o’clock?

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

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?

What’s the answer? and how do i solve it ?