STA215H5 Lecture Notes - Lecture 5: Rstudio
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Or, we can use rstudio. z-scores and percentiles from probabilitieshave probability, want z-score. We can use z-tables to find standard normal probabilities. General normal probabilities have x observation, want probability. If ~ (cid:894)(cid:1008),(cid:1005)(cid:1006)(cid:895), the(cid:374) (cid:894) (cid:1009). (cid:1009)(cid:895) (cid:894) (cid:1004). (cid:1005)(cid:1006)(cid:1009)(cid:895) (cid:1004). (cid:1009)(cid:1009) (cid:1005)(cid:1006) x x n p x p p ) (cid:373) s xvalues and percentiles from probabilitieshave probability, want x value. From the z- tables, (0. 84)0. 20 using the relationship between and , ,we have 0. 841246. 08. From the z- tables, (0. 84)0. 20 using the relationship between and , ,we have 0. 841246. 08b. From the z- tables, (0. 33)0. 63 by symmetry, (0. 33)0. 63 using the relationship between and xxxpzpzx. Know the z-score and want to find the probability another. , ,(cid:449)e ha(cid:448)e (cid:1004). (cid:1007)(cid:1007)(cid:1005)(cid:1006)(cid:1008)(cid:1004). (cid:1004)(cid:1008) randomly selected outcome will be above it. Know the z-score and want to find the probability another randomly selected outcome will be below it. Know the upper tail probability and want to find the z-score.
