Petua Gigi Palsu Group Activity

Petua GIGI PALSU

Prepared : Lim Hwee Cheng

TASK 1 On an average, 0.4% of the eggs would have broken
before arriving at a grocery shop.
If a sample of 5000 eggs is selected.

What is the DISTRIBUTION for above situation ?

A Normal Distribution
B Binomial Distribution

C Poison Distribution

D None is Correct

TASK 2 Use Normal distribution to approximate X ~ B(5000,0.4).
Which of the following is the correct approximation ?

A X ~ N (500, 0.02)
B X ~ N(2500, 0.2)
C X ~ N ( 2000,1200)
D None is correct

TASK 3 Choose the CORRECT STATEMENT ?

A Not less than 29 eggs were broken = P( X < 29)
B From 23 to 31 eggs were broken = P( 23  X  31)
C Between 24 and 27 eggs were broken = P( 24  X  27)
D Fewer than 28 eggs were broken = P ( X  28)

Apply “PETUA GIGI PALSU” to write an
TASK 4 APPROPRIATE Continuity Correction for P( 5 < X  8) .

Petua Gigi Palsu P ( 4.5 < X < 7.5 )

A

B P ( 5.5 < X < 7.5 )

C P ( 4.5 < X < 8.5 )

D P ( 5.5 < X < 8.5 )

456 789

The continuity correction for the probability

TASK 5 at most 30 eggs were broken?

Petua Gigi Palsu A P( X < 30 ) = P ( X < 30.5 )

B P( X < 30 ) = P ( X < 29.5 )

29 30 31 C P( X  30 ) = P ( X < 30.5 )
D P( X  30 ) = P ( X < 29.5 )

TASK 6 What is the continuity correction for

not more than 80 eggs were broken ?

Petua Gigi Palsu A P( X >= 80) = P ( X > 79.5)
B P(X  80) = P(X < 80.5)
79 80 81 82 C P(X < 80) = P(X<79.5)
D P(X>80) = P(X>80.5)

The probability of from m eggs to n eggs

TASK 7 is 0.9 . Which statement is correct ?

A P( m < X <n ) = P(m  0.5 < X < n  0.5) = 0.9
B P( m  X  n ) = P(m+0.5 < X < n+0.5) = 0.9
C P( m < X < n ) = P(m+0.5 < X < n0.5) = 0.9
D P( m  X  n ) = P(m0.5 < X < n+0.5) = 0.9

TASK 8 What is the continuity correction for
P( |X| < 40) ?

A P(40.5 < X < 40.5)

B P(39.5 < X < 39.5)
C P (39.5 < X < 40.5)
D P ( 40.5 < X < 39.5)