Question

Let’s assume that we want to check if the pH of a stream has changed significantly in the past year. A water sample from the stream was analyzed using a pH electrode, where six samples were taken. It was found that the mean pH reading was 6.5 with standard deviation sold = 0.2. A year later, six more samples were analyzed, and the mean pH of these readings was 6.8 with standard deviation snew = 0.1.  ​

Answer 1

Answer:

sory bahi nahi pata

i thing anser 600°