8.In our class, your grade is weighted.Your test average counts for 50% of your grade, your lab average counts for 20% of your grade, your homework average counts for 15% of your grade, and your attendance and class participation counts for the remailing 15% of your grade.Find your weighted average if your test average is a 78%, your lab average is a 88%, your homework average is a 70%, and your attendance average is a 85%.

9.The number of minutes that Dwayne Wade played in the first 12 games of the 2012-2013 NBA regular season are listed:

353534283233402938343234

Find each of the following: (Round to three decimal places)

a.Mean

b.Median

c.Mode

d.Range

e.Sample Standard deviation

f.Display the data in a stem-and-leaf plot (Make sure to provide a key)

10.The number of regular season wins for each Major League Baseball team in 2012 are listed:

9590736993668588726889

9493759481746998559783

8879618681947664

a.Use your graphing calculator to find the five-number summary of the data set.

b.Find(Fences).Are there any outliers?

c.Display the data in a box-and-whisker plot.

11.The mean speed of a sample of vehicles along a stretch of highway is 67 miles per hour with a standard deviation of 4 miles per hour.Use the Empirical rule for the following:

a.Estimate the percent of vehicles whose speeds are between 63 mph and 71 mph.

b.Estimate the percent of vehicles whose speeds are between 59 mph and 67 mph.