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Research and development has designed a ball point pen so that the true average writing lifetime under controlled conditions (involving the use of a writing machine)is at least 12 hours.A random sample of 18 pens is selected,the writing lifetime of each is determined,and a normal probability plot of the resulting data supports the use of a one-sample t test.
-A company produces electrical devices operated by a thermostatic control.According to the engineering specifications,the standard deviation of the temperature at which these controls actually operate should not exceed 2.0 degrees Fahrenheit.For a random sample of 25 of these controls,the sample standard deviation of operating temperatures was 2.36 degrees Fahrenheit.Stating any assumptions you need to make,test at the 5% level the null hypothesis that the population standard deviation is at most 2.0 against the alternative that is bigger.
Wealth Disparities
Economic inequalities among different population groups, characterized by significant differences in the distribution of wealth.
Decision Making
The cognitive process of selecting a course of action from among multiple alternatives, typically involving an assessment of risks and benefits.
Relevant Information
Information that is applicable and significant to the decision-making process, typically impacting outcomes or actions.
Periphery
An area that is on the edge or outskirts of a main region, often referred to in economic, political, or geographical contexts.
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