Given that a researcher reports that there is a significant difference between two treatments at the .05 level of significance.
This implies we can be 95% confident that for samples of large size randomly drawn from the two treatments the difference would be statistically significant.
Because the test statistic we arrived for difference assuming H0 to be true has a p value less than 5% we conclude there is a significant difference between the averages of the two treatments.
Hence this does not mean that the average score for one treatment is at least 5% higher than the average score for the other treatment.
Step-by-step explanation: The question tells us that the population decreases by 1/4 every single year. That means, since 1/4 equals .25, the population decreases by 25% every year :)
