In the early days of the iPod, MacInTouch (www.macintouch.com/reliability/ipod failures.html) surveyed readers about reliability. Of the 8926 iPods owned at that time, 7510 were problem-free while the other 1416 failed. From the data on the CD, compute the failure rate for each of the 17 iPod models. Produce an appropriate graphical display of the failure rates and briefly describe the distribution. (To calculate the failure rate, divide the number failed by the sum of the number failed and the number OK for each model and then multiply by 100.)
Answer to relevant QuestionsFor the data in Exercise 1: a) Would you expect the mean age to be smaller than, bigger than, or about the same size as the median? Explain. b) Find the mean age. c) Find the median age. Historic ozone levels (in parts per billion, ppb) were recorded at sites in New Jersey monthly. Here are boxplots of the data for each month (over 46 years) lined up in order (January = 1). a) In what month was the highest ...A real estate agent notices that houses with fireplaces often fetch a premium in the market and wants to assess the difference in sales price of 60 homes that recently sold. The data and summary are shown in the table. Write ...Using the hurricanes data set, examine the number of major hurricanes (category 3, 4, or 5) by every full decade from 1851 to 2000. a) Create a histogram of these data. b) Describe the distribution. c) Create a timeplot of ...Here is a histogram of the monthly CPI as reported by the Bureau of Labor Statistics (ftp://ftp.bls.gov/pub/special.requests/cpi/cpiai.txt) from 2008 through 2012: Here is the time series plot for the same data. a) What ...
Post your question