elements of statistical methods for scientific experiments

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Measurements, Significant Figures, Propagation of Uncertainties, Normal Distribution, Correlation & Regression

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  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

    1/23

    (Jbjnjfts c` [tdtestekdb Njtacls `cr [kejftefflk Jxpjrenjfts)

    =4

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    ?

    =.=:nn ;0.::= nn ;0.: nn

    ;0.::?4

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    ;

    (ufkjrtdefty) 4 4

    4.? :.? P :.< P (crljr) 4 4= 4 (prjkesecf) =.4 P (rjpjdtdoebety) (rjprclukeoebety) ? (dkkurdky)

    ]rcodoebety

    ljfsety

    Dkkurdky

    ]rjkesecf Pdbuj

    _j`jrjfkj vdbuj

    4.;8 (dkkurdky) (prcodoebety ljfsety) (prjkesecf) ( attp8//jf.weiepjled.crg/weie/DkkurdkySdflSprjkesecf 4? ?::7)

    ?. (segfefflkdft fflgurjs)

    (segfefflkdft fflgurjs)

    ?

    : 0 :.4 P, :.? P, . . . ,:.5 P =.4 P

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

    4/23

    qojst q (?.4)

    qojstqq

    q () xy x y q xojst yojstqx+y< q

    q> x+y > (xojst+yojst) (x+y) (?.?)

    ?.4(bjfgta c` rcpj) ( !)

    d > (4 (?4.;4 =.=:)kn; (eflerjkt njdsurjnjfts)

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    :

    (?.?)

    > d+o > (4 (;7.5; =.4=) kn ;7.5;

    =.4= ;7.1;kn;1.=;kn

    o o > (?4.;=7 =.==:)kn

    >d+

    o > (4 (;7.5?7 =.=::) kn

    7 ? () d 7 7

    > (;7.5; =.=::) kn

    crljr

    > (;7.5; =.=0)kn

    () ;7.17kn;7.55kn (prcodobj rdfgj c` vdbuj)

    (crljr)

    crljr

    qxy xy

    q> xy > (xojst x)(yojst y) >xojstyojst (xojsty +yojstx+xy)

    x xy yq xojstyojst (xojsty +yojstx) (?.;)

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    0

    qxojsty +yojstx

    q

    qojst x

    xojst+

    y

    yojst(?. qojst q

    @(q) qqojst

    (?.:)

    (?.@(xy) @(x) +@(y) (?.0)

    ?.?(drjd c` rjktdfgubdr pbdtj) 4 nn

    w

    w> (4?.: =.:)kn, > (1.1 =.;)kn ()

    Dojst > wojstojst > (4?.: 1.1)kn? > 44= kn?

    Dnef> wnefnef> (4?.= 1.:)kn? > 4=? kn?

    Dndx> wndxndx> (4;.= 5.4)kn?

    > 441.; kn

    ?

    1 4=?kn? 441 kn?

    D> (44= 1)kn?

    =.;

    w

    @(w) > =.:

    4?.:>

    =.;

    1.1 > ;.

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    7

    7. 7. 1.4 (44= 1)kn? 7.?% rubj c` tauno ()

    44= kn?(4.44=?) kn?

    crljr () DD (=.4 4=?) kn? rubj c` tauno

    @(D) > =.4 4=?

    4.4 4=?

    > 5.4%

    7. (44= 1)kn? D > (4.4 =.4) 4=? kn? rubj c` tauno

    (?.0)

    crljr

    rubj c` tauno ()

    (\dybcrs tajcrjn) `(x)=, 4, . . . , (f+ 4)x > k

    `(x) >f

    i>=

    `(i)(k)

    i! (x k)i + `

    (f+4)()

    (f+ 4)! (x k)f+4 (?.7)

    xk`(x)x=`(x) `(k) +`(k)(x k) + `

    (k)

    ? (x k)? +. . . (?.1)

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    1

    `(x) > sef x

    sef x x x;

    ;! +

    x:

    :! x

    7

    7! +. . . (?.5)

    x rubj c` tauno

    (trdfskjfljftdb `ufktecfs) (drgunjft):

    ;. (rdflcn ufkjrtdeftejs dfl fcrndb lestreoutecf)

    (jrrcr)0 (rdflcn ufkjrtdeftejs) (systjndtek ufkjrtdeftejs)7

    (rdflcn ufkjrtdeftejs) (rjdktecf tenj) (fcrndb lestreoutecf) (oeds)

    (systjndtek ufkjrtdeftejs) 4 nn ( 4.; nn)

    ;.4 (d) (l) (o) (k)

    : sef x x0 (njtrcbcgy)

    7 (fcf-systjndtek ufkjrtdeftejs)

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    5

    ;.48

    ( ) (kdbeordtj)

    ;.?8

    ;.4. (fcrndb lestreoutecf)

    () 4= (kn)

    ?0, ?

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

    10/23

    4=

    4=

    ?;, ?ne>4

    @exe (;.;)

    n F () @e (rjbdtevj`rjqujfky)`exe F

    @e `eF (;.4

    @e > 4 (;.:)

    (;.:) (fcrndbezdtecf kcfletecf)

    (aestcgrdn) ;.;

    ;.;8 4=

    1 (dretanjtek njdf)

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

    11/23

    44

    (odr aestcgrdn) 4=

    ?0.

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

    12/23

    4?

    ;.:8 4==

    ;.08 4,===

    ;.0 (lestreou-tecfs) (;.0) x x +lx

    ](x, x+lx) >`(x) lx (;.7)

    `(x) lx> 4 (;.1)

    4 Yd, o^

    ](d, o) >

    od

    `(x) lx (;.5)

    (leskrjtj) x x x (;.;)

    x >

    x `(x) lx (;.4=)

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    4;

    ;.7 (fcrndb lestreoutecf)

    ;.78

    (fcr-ndb lestreoutecf)

    `G(x9 Q, ) > 4

    ?jxp

    (xQ)

    ?

    ??

    (;.44)

    (;.44) (Gdussedf lestreoutecf) (pdrdnjtjr) Q Q ;.1

    ;.18

    () (pceft c` efjktecf)5

    (;.44) 4 Q

    5 x > k `

    (k) > =

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    4

    4F

    Fi>4

    (x x)? (;.4?)

    (;.4?)

    [x >

    4F 4

    Fi>4

    (x x)? (;.4;)

    F > 4 [x > =/= x > = F > 4 [x

    x [x x+[x

    ](x [x, x+[x) > 4[x

    ?

    x+[xx[x

    jxp

    (x x)

    ?

    ?[?x

    > =.01 (;.4x [x 01%

    x >

    x

    t[x

    E(t) ](x t[x, x+t[x) > 4

    ?

    tt

    jxp

    z

    ?

    ?

    lz (;.4:)

    (;.4:) ;.;

    ;.;8 x > x t[x t

    t = =.: 4.= 4.: ?.= ?.: ;.=

    E(t) = =.;1 =.01 =.17 =.5:< =.511 =.557

    [x t

    [x

    @([x) > 4

    ?(F 4)(;.40)

    F

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    4:

    ;.?. (prcpdgdtecf c` ufkjrtdeftejs)

    (eflerjkt njdsurjnjft) (prcpdgdtecf c` ufkjrtdeftejs)(kcnoefjl ufkjrtdeftejs)

    x K (jxdkt funojr) xx[x

    ]x(x, x+lx) jxp (x x)

    ?

    ?[?x

    (;.47)

    q> x+K q > x +K

    ]q(q, q+lq) jxp (q q)?

    ?[?q

    > jxp

    (x+K x K)?

    ?[?q

    > jxp

    (x x)?

    ?[?q

    (;.41)

    ]x(x, x+lx) >]q(q, q+lq) [q >[x ()

    xO q> Ox]x(x, x+lx) ]q(q, q+lq)

    ]q(q, q+lq) jxp (q/O x)

    ?

    ?[?x

    > jxp

    (q Ox)

    ?

    ?(O[x)?

    (;.45)

    x y

    ]x(x+lx) jxp x

    ?

    ?[?x

    , ]y(y+ly) jxp

    y

    ?

    ?[?x

    xy xy

    ](x, x+lx9 y, y+ly)

    jxp

    x?

    ?[

    ?

    x

    y?

    ?[

    ?

    y 9 q> x+y (;.?=)

    x?

    D +

    y?

    O >

    (x+y)?

    D+O +z?9 z? >

    (Ox Dy)?DO(D+O)

    (;.?4)

    ]x+y,z jxp

    (x+y)

    ?

    ?([?x+[?y)

    jxp

    z

    ?

    ?

    (;.??)

    zzz

    ]x+y jxp (x+y)

    ?

    ?([?x+[?y)

    (;.?;)

    [x+y >

    [?x+[?y

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    40

    xy x y q> x+y

    q> x+y > (x x) + (y y) + (x+ y) (;.? x+y+ +z (;.?:)

    qx y[x x [y y qx y

    q(x, y) q(x , y) +

    q

    x

    (x x) +

    q

    y

    (y y) (;.?0)

    (q/x) (pdrtedb ljrevdtevj)4= q x (x , y)(q/y)

    q

    [q

    > qx

    [x?

    +qy

    [y?

    (;.?7)q

    [q >

    q

    x[x

    ?+

    q

    y[y

    ?+ +

    q

    z[z

    ?(;.?1)

    (;.?1) q> xf f

    [q >fxf4[x

    @(xf) >f@(x) (;.?5)

    @(x) (?.:)

    ;.;. (stdfldrl ljvedtecf c` taj njdf)

    x [x xF

    4=` x `x

    ` x

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    47

    ( )

    x F (ixi) /F (;.4;) [x Q xx4, x?. . . , xF Q [x (;.?1)

    [x >

    F

    [xF

    ?>

    [xF

    (;.;=)

    x F Q

    [xx > x [x xx [xx +[x

    x x > xojst x >x [xx Yx [x, x+[x^ 01 (kcffflljfkj bjvjb)

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    41

    = 4 ? ; < : 0 7

    =

    :

    4=

    4:

    ?=

    ?:

    ;=

    ;:

    @crkj vs. dkkjbjrdtecf c` vdrecus ndssjs

    Ndss 4

    d (n/s?)

    @

    (F)

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

    19/23

    45

    ? e

    ye > ne

    xe+kF

    exeye > ne

    x?e +kexe

    (

    x?

    y x xyF

    x? (x)? (

    xyx?

    (

    4

    F 4e

    (ye nxe)? ( y

    e

    x?e

    4/?(

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

    20/23

    ?=

    r? (kcj`fflkejftc` ljtjrnefdtecf) = 4 r? 4

    r?r? >

    ey

    ?e

    ey?e

    ( nxen ( ?

    g (:.4)

    g >

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    ?4

    :.;8 g

    (kn) \(s) g (kn/s?) (kn) \(s) g (kn/s?) g (n/s?)

    :7.; 4.:?4 5.71 4=? =.? =.==; =.=: 4=? 5.71 =.=:04.4 4.:07 5.1?

    4=? =.? =.==; =.=:

    4=? 5.1?

    =.=:

    7;.? 4.741 5.75 4=? =.? =.==; =.=: 4=? 5.75 =.=:1;.7 4.1;: 5.14 4=? =.; =.==< =.=: 4=? 5.14 =.=:5:.= 4.5:? 5.1< 4=? =.; =.==< =.=: 4=? 5.1< =.=:

    g

    g >4:

    (5.71 + 5.1? + 5.75 + 5.14 + 5.1 5.14 n/s? (:. 4F

    (g4)? + (g?)? + + (g:)? > ?.45kn/s? (:.:)

    g

    g> (5.14 =.=?)n/s? (:.0)

    g g (:. ?.57kn/s? > =.=; n/s? (:.7)

    g> (5.14 =.=;)n/s? (:.1)

    01%

    g (:.?) \? >

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

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    ??

    =.= 4=.= ?=.= ;=.=

  • 5/20/2018 Elements of Statistical Methods for Scientific Experiments

    23/23

    ?;

    (rj`jrjfkjs)

    \dybcr, H._.Df eftrcluktecf tc jrrcr dfdbyses8 \aj stuly c` ufkjrtdeftejs ef paysekdb njdsurj-njfts. ?fl jletecf. Zfevjrsety [kejfkj Occis8 KD, 4557.

    Wdbpcbj, _.J.]rcodoebety & stdtesteks `cr jfgefjjrs & skejftests. 5ta jletecf, ]rjftekj Adbb8 Z[D,?=4?.

    Jesjfadujr, H.G._jgrjssecf tarcuga taj cregef, \jdkaefg [tdtesteks,?:(;), pp.70-1=, ?==;.

    Dftcf A., E. Oevjfs, [. Ldves.Kdbkubus8Jdrby trdfskjfljftdbs. 4=ta jletecf. Webjy8 Z[D, ?=4?.