A gamma function problem

Please solve this task while describing the process for solving it, assume that statistical terminology is understood at a basic level.

The task is in the attached picture.

Best regards.

Answer

Answers can be viewed only if
  1. The questioner was satisfied and accepted the answer, or
  2. The answer was disputed, but the judge evaluated it as 100% correct.
View the answer
  • Thank you, much appreciated.

  • Would you mind adding the actual function that is used to get the result 10.85081?

  • I did. In R the function is qgamma(.05, 10, 1/2). In excel, the function is GAMMA.INV(0.05, 10, 2).

  • I mean the actual mathematical function. What does the mathematical fucntion that is being used to solve this problem look like??

  • Google ‘gamma inverse cdf’

The answer is accepted.