The conclusion drawn is inappropriate because the data collection is unreliable and the method used for collection is wrong.
Explanation:
The use of wrong methods for the collection of data for such studies and then drawing conclusions out of them is one of the causes for the study to be said to be unreliable completely.
There is no way to reliably conclude the age at which the children start to walk by talking to the parents as parents do not qualify or take time data of the time children start walking.
The parents are unreliable sources here no matter how big the sample size is and only the researchers themselves could notice and get the reliable results required in this case.
Sacco and Vanzetti, Julius and Ethel Rosenberg it happened one night, you can't take it with you, mr smith goes to Washington, its a wondful
Answer: preponderance of evidence.
In a civil case it must be proven that essentially something more than likely occurred in a certain way. This burden of proof is the responsibility of the plaintiff. As compared to a criminal case where the burden of proof is on the defendant (reasonable doubt).
Rosa Parks let black people sit wherever they want on the bus