Knowledge of measurement techniques and statistics is needed only for exercise physiologists who are going to carry on independent research in the field, not for the average exercise science practitioner.

statistics is a science that teaches how to effectively generate data ,input our data collected and analyze it. Almost every human collect data at every point in time depending on your field. For an exercise practioner he could collect data on the number of people his practicing with,analyze and make meaningful interpretation of the result,data can be collected on plants etc.

Explanation:The knowledge of statistics is for everyone and not limited for certain discipline the rate of use is what differs.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.