Which statement best describes the spread of Islam by 1500 CE? It had spread to most of North Africa and western Asia.
It was limited to land around the Arabian Peninsula.
It had spread to most of northern and western Europe.
It was limited to territories that could be reached by land.

on november 6 and 7, 1917 (or october 24 and 25 on the julian calendar, which is why the event is often referred to as the october revolution), leftist revolutionaries led by bolshevik party leader vladimir lenin launched a nearly bloodless coup d'état against the duma's provisional government.

the united states constitution defines the structure of the national government and dictates the scope and limitation of its powers. the constitution is known as “the supreme law of the land” and all other laws are measured against it. the application of the articles and amendments of the constitution comprise constitutional law.

in addition to the united states constitution, each state has its own constitution and therefore, its own body of constitutional law as well. state constitutions resemble the federal constitution in that they outline the state government’s structure of legislative, executive and judicial branches as well as contain a bill of rights.

but there are various ways state constitutions differ from the federal constitution. often, state constitutions are much longer and more detailed than the federal constitution. state constitutions focus more on limiting rather than granting power since its general authority has already been established. as a result, the constitution of alabama is six hundred pages long whereas the federal constitution can be easily read in one sitting front to back.

the details in state constitutions are not particularly “constitutional” in nature. they often address topics unique to the state. the federal constitution can only be amended through a lengthy process designed to limit changes to this fundamental document. as a result, it has only been amended seventeen times since the adoption of the bill of rights in 1791.

state constitutions are more open to amendments. amendments can be proposed by legislature, a constitutional commission or citizens’ petition and can be accepted by referendum.   for example. the constitution of massachusetts has been amended one hundred and twenty times. the constitution of georgia has even been replaced altogether as many as ten times.

a hypothesis is an expected answer to a question, usually based on some theory or prior research. hypothesis testing is a method of determining the viability of a hypothesis. let’s use the us presidential election as an example. there are many hypotheses (questions) about how people feel or whom they will vote for. the only way to know the 100% “truth” about the answers to these questions is to ask every single possible voter – something that is impossible, expensive, time consuming etc. instead, we take samples and use statistics to make “best guesses” about the answer to a particular hypothesis. we never know for sure if our conclusion is right at the time we accept/reject it, but these techniques, when used appropriately can get us close to the truth most of the time (which is a lot better than guessing, flipping coins or throwing darts to get answers).

the tricky part about hypothesis testing is that we have to think somewhat backwards about it – we have to test what is known as the “null hypothesis”. as an example, the hypothesis might be “obama is more popular than romney” while the null hypothesis is “there is no difference in popularity between obama and romney”. we focus on the null hypothesis because it tells us exactly what the expected value of our tests should be (obama popularity = romney popularity) and we can collect data and see if it comes out that way (see next section on “significance”). if it does, then we “accept the null hypothesis” and reject our original hypothesis. if the null hypothesis is disproven, we look at the data to see if our original hypothesis holds (obama> romney).