Develop the Null and Appropriate Hypotheses That Are Most Appropriate

question 128

Short Answer

Develop the null and appropriate hypotheses that are most appropriate for each of the following situations:
A meteorologist claims that the average high temperature for the month of August in Chicago, Illinois is 83°F. If the residents of Chicago do not believe this to be true, what hypotheses should they test?
H₀: ______________
H₁: ______________
A car manufacturing plant is acting in accordance with the public's interest in making cars that have gas mileage of at least 28 miles per gallon. The supervisor will only let the cars off the manufacturing floor if the gas mileage is more than 25 miles per gallon. What hypotheses should the plant test?
H₀: ______________
H₁: ______________
A spokesperson for the Health Department reports that a fish is unsafe for human consumption if the polychlorinated biphenyl (PCB) concentration exceeds 5 ppb. The Carlson family is interested in the mean PCB concentration in a fish from the lake on which they live. What hypotheses should they test?
H₀: ______________
H₁: ______________
An Internet survey revealed that 50% of Internet users received more than 10 e-mail messages per day. A similar study on the use of e-mail was repeated. The purpose of the study was to see whether use of e-mail has increased.
H₀: ______________
H₁: ______________

Recognize and apply proper punctuation standards in business writing.

Correct improper use of pronoun case.

Identify and correct dangling modifiers.

Use correct tense in sentences.

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Definitions:

Everyday Lives

Refers to the daily activities, routines, and interactions that make up an individual's normal existence or way of living.

Common Sense

The basic level of practical knowledge and judgment that is shared by a large number of people; the ability to make sound decisions on everyday matters.

Logic of Science

The principles and criteria for valid reasoning and argument within scientific disciplines, including the methods for empirical verification and hypothesis testing.

Sensible Conclusions

Logical or reasonable conclusions derived from available evidence and sound reasoning.