A report indicates that the average Major League game last 3 hours and 30 minutes ...

1.      A report indicates that the average Major League game   last 3 hours and 30 minutes. A sample of 17 games revealed the following   times to completion. (Note that the minutes have been changes to fractions of   hours, so that a game that lasted 2 hours and 24 minutes is reported at 2.40   hours. Can we conclude that the mean time for a game is less than 3.50 hours?   Use the .05 significance level.                         2.98 2.4 2.7 2.25 3.23 3.17 2.93 3.18 2.8   2.38 3.75 3.2 3.27 2.52 2.58 4.45 2.45      

2.       · The amount of income spent on housing is an   important component of the cost of living. The total costs of housing for   homeowners might include mortgage payments, property taxes, and utility costs   (water, heat, electricity). An economist selected a sample of 20 homeowners   in New England and then calculated these total housing costs as a percent of   monthly income, five years ago and now. The information is reported below. Is   it reasonable to conclude the percent is less now than five years ago?   Homeowner Five Years Ago Now   1 17 10   2 20 39   3 29 37   4 43 27   5 36 12   6 43 41   7 45 24   8 19 26   9 49 28   10 49 26   11 35 32   12 16 32   13 23 21   14 33 12   15 44 40   16 44 42   17 28 22   18 29 19   19 39 35   20 22 12