Adnan is the branch manager at a local insurance company. Recently, Adnan’s been receiving customer feedback saying that the wait times for a client to be served by a customer service representative are too long. Adnan decides to observe and write down the time spent by each customer on waiting. Here are his findings from observing and writing down the wait times spent by 42 customers:       43.1 43.5 42.2 54.1 40.4 42.1 31.1 31.4 45.1 35.6 40.3 45.5 45.6 36.3 45.3 32.3 40.2 43.4 37.6 50.2 30.3 36.5 50.1 30.2 32.4 37.5   36.5 47.3 31.4 43.1 47.2 31.3 47.1 43.2   45.3 31.2 45.2 30.2 31.6 45.1 32.6 54.2

please solve all parts within 30 minutes.

Some commercial airlines recirculate about half the air in the cabin during flights as a way to improve fuel efficiency. Other airlines make a policy of NOT recirculating the air and instead, have fresh air from the atmosphere constantly being inserted into the cabin with the “old” air being pumped out of the plane. A total of 1100 passengers flying from San Francisco to Denver were used for an experiment. After their flight, they were each given a list of symptoms associated with the common cold. They were asked to report if they experienced cold symptoms within 24 hours of the flight landing. Of the 517 passengers who flew on planes that recirculate the air, 108 reported post-flight cold symptoms. Of the 583 passengers who flew on airlines that do not use recirculation in the cabin, 110 reported symptoms. Suppose now that we want to use the recirculation of air data to explore “Goal #2”, which is to resolve a hypothesis test about . a) If we want to resolve this hypothesis…

The table below shows the results of a survey in which 142 male and 145 female workers ages 25 to 64 were asked if they had at least one month's income set aside of emergencies.