2016 - Demo-Grade 11 Teacher Mass Training
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Transcript of 2016 - Demo-Grade 11 Teacher Mass Training
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DENT F CAT ON OF REG ONS
UNDER NORMAL CURVE
JUNE 09, 2016
STAT ST CS AND PROBAB L TY:
NORMAL D STR BUT ON
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WHAT WE ARE ABOUT TO LEARN…
Identify e!i"n# $nde t%e n"&'( )$*e)"e#+"ndin! t" diffeent #t'nd'd
n"&'( *'($e#
Find t%e 'e' "f t%e e!i"n ,it%in t%e
n"&'( )$*e-
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T%e #%'+e "f t%e n"&'(
di#ti.$ti"n )$*e i# ////////////-
An#,e: Be((0#%'+ed
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T%e &e'n1 &edi'n1 'nd &"de 'e
e2$'( 'nd (")'ted 't t%e
///////////-
An#,e: )ente "f t%e
di#ti.$ti"n
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T%e )$*e i# #y&&eti)'( '."$t
t%e /////////// 'nd i# ////////////-
An#,e: &e'n3)"ntin$"$#
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T%e )$*e ne*e t"$)%e# t%e
///////////-
An#,e: 40'4i#
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PROPERTIES OF STANDARD NORMAL DISTRIBUTION
T%e n"&'( di#ti.$ti"n )$*e i#
.e((0#%'+ed-
T%e &e'n1 &edi'n1 'nd &"de 'e e2$'( 'nd
(")'ted 't t%e )ente "f t%e di#ti.$ti"n-
T%e )$*e i# #y&&eti)'( '."$t t%e &e'n-
T%e )$*e i# )"ntin$"$#-
T%e )$*e ne*e t"$)%e# t%e 40'4i#-
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Refe t" t%e !'+% .e(",1 identify t%e di#t'n)e "f t%e #%'ded +'t-
Wite t%e 'n#,e "n t%e +'+e !i*en t" y"$-
R'i#e y"$ !"$+# 'n#,e ,it%in 5 #e)#-
67 An#,e: 8
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Refe t" t%e !'+% .e(",1 identify t%e di#t'n)e "f t%e #%'ded +'t-
Wite t%e 'n#,e "n t%e +'+e !i*en t" y"$-
R'i#e y"$ !"$+# 'n#,e ,it%in 5 #e)#-
68 An#,e: 9
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Refe t" t%e !'+% .e(",1 identify t%e di#t'n)e "f t%e #%'ded +'t-
Wite t%e 'n#,e "n t%e +'+e !i*en t" y"$-
R'i#e y"$ !"$+# 'n#,e ,it%in 5 #e)#-
6 An#,e: 7
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Refe t" t%e !'+% .e(",1 identify t%e di#t'n)e "f t%e #%'ded +'t-
Wite t%e 'n#,e "n t%e +'+e !i*en t" y"$-
R'i#e y"$ !"$+# 'n#,e ,it%in 5 #e)#-
6; An#,e: 7-5
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Refe t" t%e !'+% .e(",1 identify t%e di#t'n)e "f t%e #%'ded +'t-
Wite t%e 'n#,e "n t%e +'+e !i*en t" y"$-
R'i#e y"$ !"$+# 'n#,e ,it%in 5 #e)#-
65 An#,e: 7-9
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DENS TY CURVE
i# t%e !'+% "f ' )"ntin$"$# +".'.i(ity
'nd &$#t #'ti#fy t%e f"((",in! +"+etie#:
7- T%e t"t'( 'e' $nde t%e )$*e &$#t e2$'( 7-
8- E*ey +"int "n t%e )$*e &$#t %'*e '*eti)'( %ei!%t t%'t i# < " !e'te- =T%'t i#1
t%e )$*e )'nn"t f'(( .e(", t%e 40'4i#->
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AREA AND PROBAB L TY
Be)'$#e t%e t"t'( 'e' $nde t%e den#ity )$*e i#
e2$'( t" 71 t%ee i# ' )"e#+"nden)e .et,een 'e'
'nd +".'.i(ity-
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THE ?0TABLE
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THE ?0TABLE
Y"$ )'n $#e t%e ?0t'.(e t" find ' f$(( #et "f @(e##0t%'n@+".'.i(itie# f" ' ,ide 'n!e "f 0*'($e#- T" $#e t%e ?0
t'.(e t" find +".'.i(itie# f" ' #t'ti#ti)'( #'&+(e ,it%
' #t'nd'd n"&'( =?0> di#ti.$ti"n1 d" t%e f"((",in!:
7- G" t" t%e ", t%'t e+e#ent# t%e "ne# di!it 'nd
t%e fi#t di!it 'fte t%e de)i&'( +"int =t%e tent%#
di!it> "f y"$ 0*'($e-
8- G" t" t%e )"($&n t%'t e+e#ent# t%e #e)"nd di!it
'fte t%e de)i&'( +"int =t%e %$ndedt%# di!it> "fy"$ 0*'($e-
- Inte#e)t t%e ", 'nd )"($&n f"& Ste+# 7 'nd 8-
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EAMPLE 6<7
Compute the percent of population between 0 and 0.4
!tart at the row
for 0.4" #ead alon$ until
0.4"
%here i& the 'alue
0.1()6
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EAMPLE 6<7 =CONTD…>
Compute the percent of population between 0 and 0.4
1(.)6* of the population arebetween 0 and 0.4 !tandard+e'iation& from the ean.
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EAMPLE 6<8
-ercent of -opulation /etween 1 and 2
t the row for 1.0,fir&t column 1.00,there i& the 'alue0.)41)
t the row for 2.0,fir&t column 2.00,there i& the 'alue0.4((2
Note 3rom 1 to 0i& the &ame a& from
0 to 51
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EAMPLE 6<8 =CONTD…>
Compute the percent of population between 0 and 0.4
!o 1.* of the population arebetween 1 and 52 !tandard+e'iation& from the ean.
dd the two to $et the total between1 and 2
0.)41) 5 0.4((2 7 0.1
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STANDARD NORMAL D STR BUT ON
6* of 'alue& are
within1 &tandard
de'iation of the
mean
9* of 'alue& are
within 2 &tandard
de'iation& of the
mean
99.(* of values are
within ) &tandard
de'iation& of the
mean
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PRACT CE 6<7
U#in! t%e +"*ided ?0T'.(e1 find t%e ?0*'($e t%'t)"e#+"nd# t" ;8-88 "f t%e +"+$('ti"n1 '# #%",n-
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PRACT CE 6<8
U#in! t%e +"*ided ?0T'.(e1 find t%e ?0*'($e t%'t)"e#+"nd# t" -7 "f t%e +"+$('ti"n1 '# #%",n-
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PRACT CE 6<
U#in! t%e +"*ided ?0T'.(e1 find t%e ?0*'($e t%'t)"e#+"nd# t" 78- "f t%e +"+$('ti"n1 '# #%",n-
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PRACT CE 6<;
U#in! t%e +"*ided ?0T'.(e1 find t%e *'($e "f t%e#%'ded => t%'t )"e#+"nd# t" ?07-591 '# #%",n-
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PRACT CE 6<5
U#in! t%e +"*ided ?0T'.(e1 find t%e *'($e "f t%e#%'ded => t%'t )"e#+"nd# t" ?7-971 '# #%",n-
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LETS RECAP…
/////// "f *'($e# 'e ,it%in7 #t'nd'd
de*i'ti"n "f t%e &e'n
/////// "f *'($e# 'e ,it%in 8 #t'nd'd
de*i'ti"n# "f t%e &e'n
/////// "f *'($e# 'e ,it%in #t'nd'd
de*i'ti"n "f t%e &e'n
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SOLVE ME
7- Bet,een < 'nd 8-; P=< 8-;>-
8- Bet,een < 'nd J7-K5
P=J7-K5 <>-- T" t%e i!%t "f 7-77 P= 7-77>-
;- T" t%e (eft "f J7- P= J7->-
5- Bet,een 8 'nd 8-;K P=8 8-;K>-
9- Bet,een 7-9 'nd J7-K P=J7-K 7-9>-
K- T" t%e (eft "f 7- P= 7->-
- T" t%e i!%t "f J7-79 P= J7-79>-
U#in! t%e ?0t'.(e +"*ided1 find t%e 'e' $ndet%e #t'nd'd n"&'( )$*e:
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ASS GNMENT
E')% &"nt%1 'n A&ei)'n %"$#e%"(d !ene'te# 'n '*e'!e "f
8 +"$nd# "f ne,#+'+e f" !'.'!e " e)y)(in!- A##$&e
t%e #t'nd'd de*i'ti"n i# 8 +"$nd#- A##$&e t%e '&"$nt
!ene'ted i# n"&'((y di#ti.$ted- If ' %"$#e%"(d i# #e(e)ted
't 'nd"&1 find t%e +".'.i(ity "f it# !ene'tin! &"e t%'n
<-8 +"$nd# +e &"nt%-