# Question

Zocdoc.com provides a service to find and make appointments with medical professionals across the United States. Suppose an analyst looking to see if a new web design had improved the percentage of people successfully making appointments found a z-score of 10.23.

a) Explain what the z- statistic means in this context.

b) Look up the 0.001 upper critical value for a z-statistic and state your conclusion about the test.

c) Why did you probably not need to look up the critical value in b) to reach your conclusion?

a) Explain what the z- statistic means in this context.

b) Look up the 0.001 upper critical value for a z-statistic and state your conclusion about the test.

c) Why did you probably not need to look up the critical value in b) to reach your conclusion?

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