The salesperson appears to have made effective use of <u>b. foot-in-the-door phenomenon</u>.
<u>Explanation</u>:
Foot-in-the-door phenomenon is a tactics used by many of the salesperson to sell their products. Under this technique, they make a customer to agree the large request by making them agree to their small request first.
Foot-in-the-door phenomenon was discovered by the psychologists Jonathan Freedman and Scott Fraser, when they met pedestrian salesmen at their heyday.
In the above scenario, the salesman visits my house and gave some free sample of cleaning liquid to try. He returns back in a week and requests to buy expensive cleaning products. This shows that the salesperson is following foot-in-the-door phenomenon.
Currently, almost all countries in South Asia are working toward full Secular Democracy, where the people are free to choose their own Religious and political View. The countries are developing really fast in the region, since this area provide the largest number of Outsourcing workers from all around the world. As for Entertainment, Indian Epic Poetry that was made into Bollywood movies is one of the most popular type of entertainment in South Asia
In development you have three stages.
1) Development
2)Testing
3)Production
The test statistics which will be used here is standard deviation.
<h3>What is standard deviation?</h3>
The standard deviation is a statistic that measures the dispersion of a dataset relative to its mean and is calculated as the square root of the variance. The standard deviation is calculated as the square root of variance by determining each data point's deviation relative to the mean.
A volatile stock has a high standard deviation, while the deviation of a stable blue-chip stock is usually rather low.
Thus, Option D is true, as standard deviation is the test statistics which will be used here.
Learn more about standard deviation here,
brainly.com/question/13905583
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