Alvin wants to know how much time his friends spend watching television compared to the population in terms of the number of hours watched during a single week. he collects the data from nine of his friends. the average time his friends spend watching television in a week is 28 hours, with a standard deviation of 9. he knows that the population mean is 34. what is the standard error? (answer using two decimal places.)

Vikram is studying the square pyramid below. on st to find the surface area of the pyramid, in square inches, vikram wrote (33.2) (34 ikram wrote (33.2)(34.2)+43(34.2)(284) what error did vikram make? o he used the same expression for the area of all four lateral faces. he used the wrong expression to represent the area of the base of the pyramid. o he used the wrong value as the height when he found the area of the lateral faces. he used an expression for surface area that only finds the total area of three faces.