Rori is observing elite marching bands as part of her dissertation study. She is particularly interested in drum major leadership styles and behavior. She has found that the drum major at her current research site is very interested in showing off for her. This is an example of:

a. response bias.

b. researcher bias.

c. sampling bias.

d. instrumentation bias.

a. response bias.

Step-by-step explanation:

As Rori observed the drum major's interest to her during leading the band is an example of response bias. It refers to the tendency of the people to respond to observation based on some factor other than the content. As Rori observed the drum major tendency having the interest to show off for her cannot be taken as her observations because it may differ for another observer, this type of observation regarding major interest is considered as response bias during observation.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this