A Large City Installed LED Streetlights,in Part,to Help Reduce Crime

question 112

Essay

A large city installed LED streetlights,in part,to help reduce crime in particular areas.The city collected the number of property crimes along nine randomly selected streets in the month before and after the LED light installation,and claims that crime has been reduced.The crime data is shown in the table. a.Specify the competing hypotheses to test the city's claim.
b.Calculate the value of the relevant test statistic and find the critical value at the 5% significance level.
c.Does the evidence support the city's claim at the 5% significance level?

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Definitions:

Bilingual Exposure

The experience of being in contact with or participating in environments where two languages are used, leading to potential bilingualism.

Cognitive Benefits

Advantages or improvements in brain function, such as memory, problem-solving, and attention, often stemming from engaging in certain activities or experiences.

Months

Units of time based on the Earth's orbit around the Sun, typically totalling twelve in a calendar year.

Spatial Relations

The concept that deals with the understanding of how objects or points are located in space in relation to one another.