Instead of measuring only a single piece of DNA with the new method, 10 pieces are measured

Question:

Instead of measuring only a single piece of DNA with the new method, 10 pieces are measured and 300 errors are found. Does the new method reduce the number of errors?
A company develops a new method to reduce error rates in the polymerase chain reaction (PCR). With the old method, the number of errors in a well-studied piece of DNA is known to have a Poisson with mean 35.0. Use a one-tailed test in each case.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...