A Level Statistics: Unit 9 - Normal Distribution Mean and Variance

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P Q J O L Y D V F V K J B W I C B O P N K
M V F W D Y S O H H M U O N N O X F O H O
C V B T R P X P A R A M E T E R S I D O E
V P C K B C G H Q H P M U H X V T C B B B
F O E S J L P L W B Q X E O H A U X Y O C
C B F N P C G Q A P Q B K G I T A V L R H
S L B W D O N E E Y Q L A V M N O R S Q J
Y G C E Q P G Q Y C J D E G H I W J U X Y
U M L Y D W E U H Q R D Q R X O U M O M X
Y O G A H C P T G A D L S E L P L U E S T
O B M G V O D V D R C X U F D L Y A N R O
A H R X C M R N A F B H L Q P I X L A E B
I P E A M G A D I Y N I X U O A R T T C C
N X N E A T N W T S W F D W X T U K L F X
D D S U S A N Y P L E Q Y W M Q O I U X U
M B Y F T I P H T S D T D A L M W S M O D
V N Y S W S U N K N O W N S J E R Q I S P
X B J Q O G W W O L U E E H L A H A S T Q
M V M X H S I P F M U W S C Y N F B N Q W
K A M Q C N V E H X P G N F J Q T I Q Y R
G L D U E W E F C O U J T X R J P X U U L

Clues

  • If you know ___ tail points you can find the mean and standard deviation (3)
  • If you know the ____, standard deviation and one tail point you can find the value of x (4)
  • If you know the ________ _________ and one tail point you can find the mean (8, 9)
  • If you know the mean and one ____ _____ you can find the standard deviation (4, 5)
  • If µ AND σ are unknown we must use these equations to solve ______________ (14)
  • If µ or σ are _______ parameters we must work backwards from the probability to work them out (7)
  • The mean and variance are the __________ of the normal distribution (10)
  • To find µ and/or σ we can use the z value from Table 4 then substituting into the ________ Normal formula (z). (8)

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