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Null, alternative and one tail testing

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Can someone please provide some assistance with this question. Its for an MBA course. There are two questions and each question needs to be between 350 and 400 words or more. Maximum number of characters 60,000. Explain the difference between the null hypothesis and alternative hypothesis. Which one can be proven in a statistical sense? How can you determine when to use a lower one‐tailed test of hypothesis versus an upper one‐tailed test? Thank you so much in advance for all your help. I really truly appreciate it!

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Solution Summary

Explanations of null and alternative hypothesis and what the differences are between upper and lower one tail testing.

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Null and alternative hypothesis
A hypothesis is a guess or an educated thought about a population that will answer the question asked of the research. In other words, its your best guess about the reason for something happening or a behavior. Hypothesis testing uses two hypotheses. These are opposing hypotheses called the null hypothesis and the alternative hypothesis. There is only one null, but there can be more than one alternative. Hypotheses are carefully constructed or worded statements.
The null hypothesis is usually based on previous research or some other factors the researcher wants to use. Usually the null says there will be no effect from any tests. In other words, the opposite of what the researcher wants to ...

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