Find the critical value tc for a 90 % Con fidence level

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Q: Find the critical z a/2 that corresponds to a degree of confidence of 91%

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Q: What is thethe critical value Z0.10

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.