The correct answer is government owned railroads
Explanation: Rail transport is carried out on railways to transport people and goods. The goods transported in this mode are of low added value and in large quantities as: ore, agricultural products, fertilizers, coal, petroleum derivatives.
6 is c, 7 is a, and 8 is b
The American psychological association encourage the addition of effect size when reporting research findings because the Statistical significance tests do not indicate the magnitude of the experimental effect.
Effect sizes are the currency of psychological research. They quantify the results of a study to answer the research question and are accustomed calculate statistical power.
Effect size is an important component when evaluating the strength of a statistical claim, and it's the primary item (magnitude) within the MAGIC criteria. the quality deviation of the effect size is of critical importance, since it indicates what proportion uncertainty is included within the measurement.
To know more about effect size here
brainly.com/question/27960293
#SPJ4
