A taste test of randomly selected students was conducted to see if there was a difference in preferences among four popular drinks.The following table shows the frequency of responses. 
The expected number of students preferring Dr.Pepper is
Definitions:
Weber's Law
A principle that states the smallest change in a stimulus, such as weight or brightness, that can be detected is a constant proportion of the original stimulus's intensity.
Differential Threshold
The smallest detectable difference between two stimuli or the minimum change in intensity that a person can detect.
Marketers
Professionals or organizations responsible for promoting, selling, and distributing products or services to customers.
Absolute Threshold
The minimum stimulus intensity that an organism can detect half the time.
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