Differences

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--- c:ps1-1:ci_note [2024/11/20 08:16] – hkimscil
+++ c:ps1-1:ci_note [2024/11/20 08:18] (current) – hkimscil
@@ Line 6: / Line 6: @@
 p1 <- rnorm2 (100000000, mean=70, sd=10)
+set.seed(101)
 s.size <- 16
 s1 <- sample(p1, s.size, replace=T)
@@ Line 42: / Line 43: @@
 > p1 <- rnorm2 (100000000, mean=70, sd=10)
 >
+> set.seed(101)
 > s.size <- 16
 > s1 <- sample(p1, s.size, replace=T)
 > s1
- [1] 67.33346 80.38354 71.51355 69.21986 60.04729 65.60540 69.31297 52.70064 76.02403
+ [1] 64.87746 78.68130 50.61449 62.18639 68.08899 63.07744 54.48954 69.26928 55.92358
-[10] 79.09528 60.57269 62.36968 69.86095 74.76315 64.24179 72.98447
+[10] 70.06123 60.38630 87.91813 78.55023 69.78835 63.15719 64.35994
 > m.s1 <- mean(s1)
 > sd.s1 <- sd(s1)
 > m.s1
-[1] 68.5018
+[1] 66.33936
 > sd.s1
-[1] 7.442683
+[1] 9.59219
 >
 > se <- sd.s1/sqrt(s.size)
-> se2 <- se*2
+> se2 <- 2*se
-> se3 <- se*3
+> se3 <- 2*se
+>
 >
 > m.s1 - se2
-[1] 64.78046
+[1] 61.54327
 > m.s1 + se2
-[1] 72.22314
+[1] 71.13546
 >
 > # or
@@ Line 71: / Line 74: @@
 [1] 2.575829
 >
-> se2 <- se*c2
+> se2 <- c2*se
-> se3 <- se*c3
+> se3 <- c3*se
+>
 > m.s1 - se2
-[1] 64.85495
+[1] 61.63928
 > m.s1 + se2
-[1] 72.14864
+[1] 71.03945
->
 >
 </code>