1. t-models, part I Using the t tables, software, or a calculator, estimate
a) the critical value of t for a 90% confidence interval with df = 17.
b) the critical value of t for a 98% confidence interval with df = 88.
2. t-models, part II Using the t tables, software, or a calculator, estimate
a) the critical value of t for a 95% confidence interval with df = 7.
b) the critical value of t for a 99% confidence interval with df = 102.
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