Elementary Statistics
Elementary Statistics
12th Edition
ISBN: 9780321836960
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 14.2, Problem 10BSC
To determine

To construct: The R chart by treating the 10 measurements from each decade as a sample.

To describe: A suggestion using the obtained results.

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The file P02_26.xlsx lists sales (in millions of dollars) of Dell Computer during the period 1987–1997 (where year 1 corresponds to 1987).      Year Sales 1 69 2 159 3 258 4 389 5 546 6 890 7 2014 8 2873 9 3475 10 5296 11 7759 a. Fit a power and an exponential trend curve to these data. Which fits the data better?     b. Use your part a answer to predict 1999 sales for Dell.    c. Use your part a answer to describe how the sales of Dell have grown from year to year.
The revenue for Google for the years 2010–2014 is shown in the following table (Wallstreet Journal, August 2014). Deflate the revenue in dollars based on the CPI (1982–1984base period). Comment on the company’s revenue in deflated dollars. Year Revenue ($ billions) CPI2010 29.3 218.12011 37.9 224.92012 50.2 229.62013 59.8 233.02014 66.7 236.7
The table shows the historical in-state tuition rates for the University of Kalamazoo. Use the data to answer the questions and round your answers to two decimal places. Academic year Rate of tuition for one semester 2008–2009 $3,812 2009–2010 $4,002 2010–2011 $4,441 2011–2012 $4,905 2012–2013 $5,181   What is the percentage increase in tuition from the 2008–2009 school year to the 2012–2013 school year?
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