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.
RESEARCH QUESTIONS The null hypothesis represents a theory that has been put forward, either because it is believed to be true or because it is to be used as a basis for argument, but has not been proved. Has serious outcome if incorrect decision is made! The alternative hypothesisis a statement of what a hypothesis test is set up to establish.
Null hypothesis. Definition. noun. (1) An assumption or proposition where an observed difference between two samples of a statistical population is purely accidental and not due to systematic causes. (2) The hypothesis to be investigated through statistical hypothesis testing so that when refuted indicates that the alternative hypothesis is true. Supplement. A null hypothesis is a hypothesis that is valid or presumed true until invalidated by a statistical test. Thus, one cannot say that a null hypothesis is ââacceptedââ rather a null hypothesis ââcannot be rejectedââ as it remains to be true based on the statistical evidence supporting it.