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สถิติอ้าง

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สถิติอ้าง

  1. 1. SC 101 2 1 1
  2. 2. ~~LQZU (Sampling Distribution of the Mean) ~l~ll$~~~~~~~;lnl~~~~~i?adl;1~~~ 8~42~ (Sampling Distribution of Proportion) a~~~ni:,rrsnIrs:QZlDln15~~~~i?Sl~l3 ?Ei~Fl'2?kJLLni‘d~~~ (Sampling Distribution of Sample Variance) the Mean) 2 2 LA,” Ox = c, J cx,- ug2 + (X2- P’,) + . . . + CT,- l.‘;) k 2 1 2 SC 101
  3. 3. 2 2 0 SC 101
  4. 4. n"?ilWl1 6.3 &ldnl?Ml Confidence intervalB04 u lMJ%?rt-distribution n?wd94Y sample mean (%) = 20 sample standard deviation fs) = LLR 2 sample size (n) = 25 x+t S OL/2,n-l I EOf1.711 2 90% 1.711 Jn 425 19.49;d20.51 = 20~0.5133 xat s 2Ok2.0641.5 95% 2.064 4,n-l T J-E- 19.38;320.62 J" = 20+0.6192 1.52Oir2.7$?7--- &?i 19.16h20.84 = 20f0.8391
  5. 5. 2 3 0 SC 101
  6. 6. X2 z (n-l )SL c 4 = (9HW2 0.81 = (9lC1.44) = 12.36 0.81 0.81 = 16 x: = 16.0 16.919 2 4 4 SC 101
  7. 7. wwh cx = 26, =cy 17, cx2= 158, cy2 = 71, cxy = 105 im:: n = 5 oJh~wos~~ 5(105) - (26)(17) r = LJWW) - w21 15(71) - 07)21 = 525 - 442 d (790 - 676) (355 - 289) = &- = 0.96 4. cd2, n-2 M% tc > t cd 2' n-2 SC 101 2 5 5
  8. 8. - 2 . 1 8 9 2 . 1 8 9 o.so f/XT 4-c.5012 (.50)(4.69) A x - . 2 5 6 SC 101
  9. 9. 2 5 8 SC 101
  10. 10. d 2 1 . can’lPla~i~~5,“~M~~~~~~~~~ln~~~a,la~a~a,”lSin f%f n. X Y ?I. X 34 21 3.9 30 22 4.6 40 25 6.0 34 28 2.8 39 15 3.7 35 24 3.4 42 24 4.2 45 22 4.0__ 43 17- - 2 =38, ? =22 x =4, s = x 5,s = 4 Y S = 1, x Y 46 4 6 52 50 48 4 0 42 44- iJ = 46 S = 4a Y 2 6 0 SC 101

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