Does the addition of insecticide to bed nets give additional benefit with respect to anemia among those at risk? A study was conducted comparing the proportion of participants who were anemic with and without insecticide treated nets.

The article reported that p=0.71 for a two-sample test of proportions, which was not statistically significant. What can we conclude?

a. Because p>0.05, we have evidence the proportions anemic are the same in the population.

b. If proportion anemic in the two populations were the same, we'd expect to observe sample values as different as ours about 71% of the time just by chance.

c. The probability the proportions anemic in the two populations are the same in the two groups is about 0.71. In other words, they are probably the same.

d. We found evidence of no difference in the two groups.