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\times 1 = 24$. | \times 1 = 24$. | ||

- | **BEFORE GOING FURTHER: You will need an introduction to the Poisson probability distribution function Po$(\Lambda)$. NOTE: To avoid confusion with the symbol $\lambda$ used later in this lab manual for the "absorption coefficient", we use upper-case $\Lambda$ for the mean of the Poisson distribution. The videos, mentioned next use lower-case $\lambda $ for this mean. Please try to avoid the possible confusion. We use | + | **BEFORE GOING FURTHER: You will need an introduction to the Poisson probability distribution function Po$(\Lambda)$. NOTE: To avoid confusion with the symbol $\lambda$ used later in this lab manual for the "absorption coefficient", we use upper-case $\Lambda$ for the mean of the Poisson distribution. The videos, mentioned next use lower-case $\lambda $ for this mean. Please try to avoid the possible confusion. We use upper-case $\Lambda $ for the mean.** |

- | upper-case $\Lambda $ for the mean.** | + | |

The easiest way to do this is to watch a series of two //YouTube// videos called //Statistics: Poisson Distribution - Introduction.// In these videos the distribution is symbolized by Po$(\Lambda)$. | The easiest way to do this is to watch a series of two //YouTube// videos called //Statistics: Poisson Distribution - Introduction.// In these videos the distribution is symbolized by Po$(\Lambda)$. | ||

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If you decide after viewing these videos that you would like to have a copy of the //Poisson Cumulative Distribution tables// mentioned in the second video, you can find them at [[http://sbhepnt.physics.sunysb.edu/~rijssenbeek/CumulativePoissonTable.pdf|this active link]]. | If you decide after viewing these videos that you would like to have a copy of the //Poisson Cumulative Distribution tables// mentioned in the second video, you can find them at [[http://sbhepnt.physics.sunysb.edu/~rijssenbeek/CumulativePoissonTable.pdf|this active link]]. | ||

- | In this lab rather than using programs built in to the webpage, as was done in previous labs, you will use an Excel spreadsheet that you may download from [[http://www.ic.sunysb.edu/Class/phy122pk/labs/Phy124Fall2011Lab9spreadsheet.xls|here]]. | + | In this lab rather than using programs built in to the webpage, as was done in previous labs, you will use an Excel spreadsheet that you may download from [[http://www.ic.sunysb.edu/Class/phy122pk/labs/Phy124Fall2011Lab9spreadsheet.xls|this active link]]. |

**CAUTION: A spreadsheet you may find on the desktop of the lab computer may be obsolete. Unless your lab TA specifically tells you otherwise, it's safer to use the one you download from the link in the previous paragraph.** You will enter your data into that spreadsheet and carry out the calculations there. | **CAUTION: A spreadsheet you may find on the desktop of the lab computer may be obsolete. Unless your lab TA specifically tells you otherwise, it's safer to use the one you download from the link in the previous paragraph.** You will enter your data into that spreadsheet and carry out the calculations there. | ||

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There is **no** other worksheet that you need to print out for this lab. | There is **no** other worksheet that you need to print out for this lab. | ||

- | If you need the .pdf version of these instructions you can get it [[http://www.ic.sunysb.edu/Class/phy122pk/labs/pdfs/phy124s13raddecaylab10.pdf|here]], **but the pdf version will not have active links to the web sites**. | + | If you need the .pdf version of these instructions you can get it [[http://www.ic.sunysb.edu/Class/phy122pk/labs/pdfs/phy124s13raddecaylab10.pdf|this active link]], **but the pdf version will not have active links to the web sites**. |

===== Video (Make sure you watch it before lab. It's VERY helpful!) ===== | ===== Video (Make sure you watch it before lab. It's VERY helpful!) ===== |