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A marketing firm surveys 11 people to see how much they like a certain perspective advertisement...

A marketing firm surveys 11 people to see how much they like a certain perspective advertisement on a 0 to 10 scale. The following were the responses of the 10 people: { 4, 3, 2, 7, 5, 6, 1, 4, 3, 9, 0}. Find the approximate 95% confidence interval for the population mean. What is the lower bound? The responses aren't from a normal distribution.

Math   Statistics-And-Probability   
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Answer #1

Solution:

Number of samples = 11

Mean = 4

Standard deviation = 2.6458

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