Although several companies developed tablets throughout the 1990s and 2000s, the tablet computer only became mainstream after Apple introduced the iPad in 2010. Later that year, Samsung released the Galaxy Tab, the first tablet to run Google's Android operating system. Like the iPad, Android tablets can run millions of different apps, making tablets a portable option for both work and play.
A null hypothesis is one that is assumed to be true unless it has been contradicted. It is used to compare to another hypothesis. The experimental hypothesis is what you are observing, and you expect it to differ from the control. erm i know that a null hypothesis is when nothing happens at all i think.
The null hypothesis. All statistical tests involve testing a null hypothesis against an alternative hypothesis. These two terms have specialised meanings, and are not the same as your research question or hypothesis. The null hypothesis and alternative hypothesis can be constructed from the research hypothesis.his section summarises the ways in which the different statistcial tests can be used in Geography. For more information on the different statistical tests, see The Seashore. For more information an excellent source developed in FSC Field Centres is Statistics for Geographers.