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# Null Hypothesis and Alternative Hypothesis

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Part 1

For the following investigative scenarios, state the null hypothesis, and the alternative hypothesis. Also identify the Type 1 and Type 2 errors which can result based on the hypotheses that you defined.

(a) You are a member of the HR department and a number of employees have to come to you claiming that they are suffering from deteriorating eyesight because they are working on computers for more than 4 hours a day.

(b) You are the administrator for a local hospital, and a large number of parents have come to you voicing concerns that placing infants in incubators leads to claustrophobia later in life.

(c) You are a member of the Facilities department, and a number of employees have come to you with the suggestion to place live plants in the office area to reduce the number of sick days taken by employees who work in that office.

Part 2

Explain whether a survey or an experiment would be most appropriate to find out about the following:

a) who is likely to win the 2016 Presidential election

b) whether nicotine gum reduces cigarette smoking

c) whether there is a relationship between height and wealth

d) whether a public service advertisement campaign has been effective in slowing the use and sales of SUVs

In your response consider whether conducting an experiment will be feasible.

https://brainmass.com/statistics/hypothesis-testing/null-hypothesis-and-alternative-hypothesis-263005

#### Solution Summary

The solution provides Null Hypothesis and Alternative Hypothesis for a set of problems

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## Null Hypothesis - Alternative Hypothesis

Identify the null hypothesis and alternative hypothesis from a given claim, and determine how to express both in symbolic form.

The formulas and data are attached. What is needed is to do is explain what is going on in the Excel spreadsheet; basically, make a translation of the math into english.

---
Null Hypothesis
The housing price decline in Sacramento was equal to that of the nation between the years 2007 and 2008.
H0 = National Means for Housing Price Decline
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Alternative Hypothesis
The housing price decline in Sacramento was greater to that of the nation between the years 2007 and 2008.
H1 > National Means for Housing Price Decline
---

Project fulfills the one sample / one-tailed Z Test requirement

This is the problem:
Identify the null hypothesis and alternative hypothesis from a given claim, and determine how to express both in symbolic form.

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