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Hypothesis Testing for tap vs. bottled water

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I conducted a hypothesis testing on bottled water vs tap water. I had one participant and 30 trials over a period of 3 days. The subject successfully identified tap vs water 14 times. I need to know how to calculate this data using Z and p value calculations in excel (or any statistical calculation) and be able to explain the data.

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The expert examines hypothesis testing for tap versus bottled water.

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Since you did thirty trials, we can assume that 50% of the time either one should show up...15 tap, 15 bottled. Based on this, you can use the calculation below where:
p=percentage of times it occurred, or 14/30 = 0.4667
n=number of trials, or 30
standard deviation= √(p(1-p)/n
...based on your data, I come up with 0.091 for a standard deviation.
To calculate the z score we then multiply that by 1.96 (the value of 95% confidence, or one standard deviation) to get 0.1785 so that our resulting score indicates that 95% of the ...

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