Answer:
Placebo effects or experimenter bias are likely to affect results
Explanation:
Due to the fact that everyone in the class is quite excited about being taught by the new method, the most obvious error will be the placebo effect, a phenomenon where some people would perceive some benefit of some sort because they already know what is expected of them. Experimental bias may also occur since everyone is quite excited, but then he chooses to allocate the teaching method to a random half and the old method to the other half. This can cause the students allocated to the old method to provide bad reports and those who are allocated to the new method to claim excitement.
Direct democracy would be extremely costly because people would have to vote on every single thing and this would cost time and money to ensure everyone has voted. It couldn't be resolved in early times, but maybe with the age of technology you could surpass that by having everyone vote online or something similar.
Answer:
May not erupt for thousands of years, may create hot spots or geysers.
Explanation:
Answer:
Barack Obama
Explanation:
Was the first African American and first biracial president of the United States, being elected in the 2008 election and re-elected in the 2012 election.
Answer: The midpoint, or number that divides a series of value into two group of equal numbers of value is refered to as "MEDIAN".
It can also be used when they is extreme values like the national incomes.
Explanation: The median is a value at the midpoint of a frequency distribution, it is used to denote the center of a line of numbers, it also tells the higher part and the lower part of the numbers. In statistics, median tells the probability of an event to occurs is equal. When median is equal to mean, it means that the frequency of numbers are properly arranged from the lowest order to the highest order.
National household income values are values with frequency of numbers, median can be used to know the midpoint of the numbers and to determine to lower part and the higher part.