Clearly define the variables and parameters
Question 5: Clearly define the variables and parameters and set up the hypotheses for each part.In 2010, Bell Canada took an average 0.4 hours to respond to trouble calls. Bell Canada obtained the data for 2014. Is there any evidence that show a change in the average response time?US Census Bureau data show that the mean household income in the area served by a shopping mall is $42800 per year. A market research firm questions shoppers at the mall to find out whether the mean household income of mall shoppers is higher than that of the general population.The average square footage of one-bedroom apartments in a new student-housing devel- opment is advertised to be 880 square feet. A student group thinks that the apartments are smaller than advertised. They hire an engineer to measure a sample of apartments to test their suspicion.To study the sleeping pattern of adolescents, a sample of 50 adolecscents, all free of severe illness, are randomly selected. The research believe that people with low sleep efficiency had an average of systolic blood pressure to be higher than 132 mm Hg.
