HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 141
Confidence intervals
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hp40g+.book Page 15 Friday, December 9, 2005 1:03 AM Results The results are: Result Test T Prob Critical T Description T-Test statistic. Probability associated with the T-Test statistic. Boundary values of T associated with the α level that you supplied. Confidence intervals The confidence interval calculations that the HP 40gs can perform are based on the Normal Z-distribution or Student's t-distribution. One-Sample Z-Interval Menu name Inputs Z-INT: μ 1 This option uses the Normal Z-distribution to calculate a confidence interval for m, the true mean of a population, when the true population standard deviation, s, is known. The inputs are: Field name x σ n C Definition Sample mean. Population standard deviation. Sample size. Confidence level. Inference aplet 11-15