They might be having Alzheimer's, please make sure she is alright.
Answer: unreliability
Explanation: Some of the problems that determine the quality of an experiment are reliability and validity.
Reliability considers the consistency of the experiment. In the example above, the result of the second sample is inconsistent with the result of the first sample, making Watt's research unreliable. That is, it does not reflect the ratings of a larger population. This problem can be solved by increasing the sample size, such that the average ratings are more reflective of a wider audience.
Validity considers the accuracy of the experiment. A lack of reliability of an experiment will likely make the result invalid as well, but this is not always the case.
<em>United state’s influence on Canada is not an example of culture hearth.
</em>
<u>Answer:</u> B) United States' influence on Canada
<u>Explanation:</u>
A culture hearth is the place of origin of a civilization. The total number of ancient culture hearths is seven. Most of the culture hearths are located near rivers and many civilizations are named according to the name of the river on the basin of which they flourished.
<em>Nile valley civilization that originated in Egypt along the river Nile, Indus valley civilization along the river Indus etc </em><em>are some examples. </em>
In the given options Wei-Huang valley is a culture hearth in China and the civilization influenced west Asia. Olmec civilization and Mayan civilization originated in MesoAmerica culture hearth and they influenced Mexico and central America.
Tulsipur, Nepalgunj, Kohalpur and Gulariya are main trade centers of province number 5 in nepal
