DataAnswer sheetRound all calculations to at least 4.pdf
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The document outlines the procedures for calculating confidence intervals and critical values based on the known or unknown population standard deviation. It specifies the use of t distribution or z distribution tables depending on the availability of sigma. Various confidence levels and their respective critical values are provided for different degrees of freedom.
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DataAnswer sheetRound all calculations to at least 4.pdf
- 1. Data Answer sheet Round all calculations to at least 4 decimal places. Briefly explain : Solution if sigma is unkowm we will use T distribution tables if sigma is know we will use Z distribution table 1) confidence interval alpha = 0.10 alpha/2 = 0.05 df = 41 critcal values : +/-1.684 2) alpha = 0.01 df = 43 critical value : -2.423 3) 2 tailed test alpha / 2= 0.025 df = 8 critical values : +/-2.306 4) confidence interval alpha / 2 = 0.05 critical values : +/- 1.64 5) lower tailed alpha = 0.01 critical value -2.32 6) upper tailed
- 2. alpha = 0.05 critical value : +1.64