A random sample of the houses in a particular city is select…

A random sample of the houses in a particular city is selected and the level of random gas is measured for each house in the sample.  The values collected are given below in parts per million (ppm).  Experience has shown that random gas level is approximately normally distributed for this population.  4, 8, 13, 6, 7, 3, 9, 8, 11, 8 Using the above data, perform an hypothesis test on the claim that the average random gas level is 6 ppm.  :

In a survey of airline travelers, subjects were observed in…

In a survey of airline travelers, subjects were observed in coach sections of airplanes to determine if men or women are more bothered by a seatmate of the opposite gender using the common armrest.  The table below contains data gathered in that study.   Bothered     Not Bothered     Females     19 26 Males 38 18   Suppose that one passenger is randomly selected.  What is the probability that the passenger is female?

In a survey of airline travelers, subjects were observed in…

In a survey of airline travelers, subjects were observed in coach sections of airplanes to determine if men or women are more bothered by a seatmate of the opposite gender using the common armrest.  The table below contains data gathered in that study.   Bothered     Not Bothered     Females     19 26 Males 38 18   What is the probability that the passenger is female OR bothered?