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please help with part a and b. thank you Check Your Understanding 1. Find the critical value f* that you would use for a confidence

please help with part a and b. thank you
Check Your Understanding 1. Find the critical value f* that you would use for a confidence interval for a population mean , in each of the following settings. If possible, check your answer with technology. (a) A 98% confidence interval based on a random sample of 26 observations (b) A 99% confidence interval from an SRS of 85 observations

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