• An inventor claims to have a technique to extend the length of time any cell phone battery stays charged by collecting "cosmic energy" using the phone's antenna. You select 10 cell phones, and measure the duration of the phone's battery charge under normal use. Then you allow the inventor to modify each phone, after which you measure the duration of the phone's battery charge under normal use. A data file containing these measurements are in the chart below.

  Phone	Unmodified	Modified Duration (hours)
  1	8.4	12
  2	13.9	19.7
  3	15	21.4
  4	13.5	24.1
  5	11.5	12.9
  6	10.6	14.5
  7	18.5	30.9
  8	12.1	15.7
  9	13.3	17.6
  10	9.9	13.5

  Do a statisical analysis on this data to determine if the inventors claim to extend battery life is correct.

  1. What does your analysis indicate?

  A) Yes, the inventor's process does extend battery life.

  B) No, the inventor's process does not extend battery life.

  2. What is the P-value associated with your decision?

  A) 0.001

  B) 0.016

  C) 0.044

  D) 0.066

  E) 0.097

  F) 0.118

  G) 0.130

  H) 0.147

  I) 0.162

  J) 0.183

  3. When using the inventor's modified phones, you noticed that the phones were more likely to drop calls and to not receive calls. You assumed that this was because the antenna was collecting "cosmic energy" at certain times, and did not think further about it. Now, however, you wonder if this may have affected the outcome of your experiment. How might this affect the validity of your statistical analysis?

  A) Not at all. The analysis and conclusions are still valid.

  B) It may affect validity because the operating conditions for the phones before and after the modifications were different.

  C) It may affect your validity because "cosmic energy" is more powerful than normal electrochemical energy.

  
  

  
  

 

Answer rating: 100% (QA)

To determine if the inventors claim to extend battery life is correct we can perform a statistical a... View the full answer