t-table - 2.62 2.58 The t-table 1 3.08 6.31 12.71 31.82...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
33b2ee5d74aadde4476ea60cec6b7374e9f44e7a.xls t-table Cumulative Probabiility df 0.9 0.95 0.975 0.99 0.995 Use this table to find a t-value given a confidence level. 63.66 2 9.93 1. Find the row by calculating the degrees of freedom (df). 3 5.84 4 4.6 2. Determine the cumulative probability corresponding to the confidence level 5 4.03 For 95% confidence, read the column under "0.975." 6 3.71 For 90% confidence, read the column under "0.95." 7 3.5 For 99% confidence, read the column under "0.995." 8 3.36 Example: 9 3.25 The t-value for a 95% confidence interval for a sample size of 10 is 2.26 3.17 Find a more detailed account of the relationship between the cumulative probability and the 3.11 confidence interval on page 21 of the clip titled "Calculating the Confidence Interval" in 3.06 Module 3: "Sampling and Estimation." 3.01 2.98 2.95 2.92 2.9 2.88 2.86 2.84 2.83 2.82 2.81 2.8 2.8 2.78 2.77 2.76 2.76 2.75 2.7 2.66
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 2.62 2.58 The t-table 1 3.08 6.31 12.71 31.82 1.89 2.92 4.30 6.96 1.64 2.35 3.18 4.54 df = sample size - 1 1.53 2.13 2.78 3.75 1.48 2.02 2.57 3.36 1.44 1.94 2.45 3.14 1.41 1.89 2.36 3.00 1.40 1.86 2.31 2.90 1.38 1.83 2.26 2.82 10 1.37 1.81 2.23 2.76 11 1.36 1.80 2.20 2.72 12 1.36 1.78 2.18 2.68 13 1.35 1.77 2.16 2.65 14 1.35 1.76 2.14 2.62 15 1.34 1.75 2.13 2.60 16 1.34 1.75 2.12 2.58 17 1.33 1.74 2.11 2.57 18 1.33 1.73 2.10 2.55 19 1.33 1.73 2.09 2.54 20 1.33 1.72 2.09 2.53 21 1.32 1.72 2.08 2.52 22 1.32 1.72 2.07 2.51 23 1.32 1.71 2.07 2.50 24 1.32 1.71 2.06 2.49 25 1.32 1.71 2.06 2.49 26 1.31 1.71 2.06 2.48 27 1.31 1.70 2.05 2.47 28 1.31 1.70 2.05 2.47 29 1.31 1.70 2.05 2.46 30 1.31 1.70 2.04 2.46 40 1.30 1.68 2.02 2.42 60 1.30 1.67 2.00 2.39 120 1.29 1.66 1.98 2.36 infinite = Z 1.28 1.64 1.96 2.33...
View Full Document

This note was uploaded on 10/19/2011 for the course QMB 102 taught by Professor Online during the Spring '11 term at Harvard.

Ask a homework question - tutors are online