Sample size
15#&2(F.7#&2"O#&-%&L%#8-%*" )/&*@%(R-)N&9")&2#8-)*2>&8()&K#&2#$&5#%#P&15"2&I"77&$(B#&#Z#8$&
"FF#*"($#73P& XC&3-@&*"*&$5"2&(88"*#)$(773H&.%#22&$5"2&.%#2#$[2&K@\-)&$-&@)*-&(77&@)2('#*&85()/#2&$-&
2(F.7#&()*h-%&.($85P&e-$#&$5($&%#2"O")/&-)73&I-%B2 &I5#)&$&,(65-&63+$IW&15"2&"2&(&*#2"/)&85-"8#H&
K#8(@2#&$5#&DE0<&5(2&)-&I(3&$-&B)-I&I5#%#&$-&%#8-%*&")&$5#&K@Z#%&-)8#&"$&5(2&%#2"O#*&$-&
2-F#$5")/&2F(77#%P
Clear sample
U#7#8$&()*&.@25&9@2#*&$-&K#&U#7#8$&()*&$@%)&")&_%FI(%#&'#%2"-)2&]&<Pc>&$-&8%#($#&(&)#I&2(F.7#&
I"$5&$5#&)@FK#%&-C&2#8-)*2&2#$&I"$5&LU(F.7#&2"O#NP&XC&3-@&*"*&$5"2&(88"*#)$(773H&.%#22&$5"2&.%#2#$[2&
K@\-)&$-&@)*-&(77&@)2('#*&85()/#2&$-&2(F.7#&()*h-%&.($85P&d-@&8()&(72-&@2#&U5"Sx?-(*&I5#)&$5#&
U(F.7#&K@\-)&"2&7"$&$-&*-&$5"2P
Recording samples
1-&2$(%$&2(F.7")/&_%2$&2##&$-&"$&$5($&3-@['#&@2#*&$5#&2(F.7")/&F#)@&*#28%"K#*&(K-'#H&()*&F(B#&
2@%#&3-@&#)(K7#*&2(F.7")/&2$(%$&.-2"R-)P&d-@&8()&$@%)&-)&L7--.")/&%#8L&(2&I#77&"C&3-@&I()$&$-&@2#&
$5#&DE0<&C-%&7"'#&2(F.7")/&()*&%#.7(3 &2"F@7$()#-@273P&X$&I"77&$5#)&B##.&7--.")/&$5%-@/5&"$2&2(F.7#&
K@Z#%&@)R7&$5#&@2#%&F()@(773&2$-.2&"$&9.%#22&U#7#8$>P
T--B&@.&3-@%&kUj&2-@)*&8(%*&()*&8-))#8$&"$&$-&(&2-@)*&2-@%8# P
e-I&F(B#&2@%#&3-@[%#&")&$5#&F(")&28%##)&()*&$5#)&.%#22&U#7#8$P&M&%#*&I".#%&25-@7*&(..#(%&()*&
25-@7*&2$(%$&%@))")/&C-%I(%*P&XC&"$&2$(32&2R77H&$5#)&%#0.7@/&$5#&kUj&8(K7#P&15#&DE0<&I"77&)-I&%#8-%*&
$5#&")8-F")/&2-@)*&")$-&$5#&K@Z#%P&U(F.7")/&"2&*-)#&($&GGP<&BTOH&<m&K"$H&F-)-P&+@7R085())#7&
2-@%8#2&(%#&8-)'#%$#*&K(8B&$-&F-)-P
d-@&8()&@2#&$5#&.7(3&K@\-)&()*&28()&B)-K&$-&.7(3&$5%-@/5&$5#&K@Z#%&($&*"Z#%#)$&2.##*2H&#'#)&
K(8BI(%*2P&M77&-)&.7(3&F-*#&C@)8R-)2&(%#&('("7(K7#P&X)87@*")/&$5#&-)0K-(%*&85-%*&K@\-)2&()*&
27"*#%2P&M77&/%()@7(%&.(%(F#$#%2&()*&23)$5#2"O#%&.(%(F#$#%2&(%#&(72-&*"%#8$73&8-)$%-77(K7#&I5"7#&
.7(3")/&$5#&%#8-%*")/&2-@)*2P
1-&2$-.&%#8-%*")/H&.%#22&U#7#8$&-)8#&F-%#P
38