Shown below is 3 x 2 table with observed values from a sample of 1500.At the 5% level of significance, test for independence of the row and column factors. 
Definitions:
Neurotransmitters
Chemical messengers that transmit signals across synapses from one neuron to another in the brain and nervous system.
Knoblike Terminals
The rounded ends of axons, known as axon terminals, which are involved in transmitting signals to other neurons or muscles through the synapse.
Axon
A narrow, lengthy protrusion from a nerve cell responsible for carrying electrical impulses outward from the neuron's main body.
Sensory Information
Data that is collected by the senses (sight, hearing, taste, touch, and smell) and sent to the brain for processing.
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