TION Shone all your work (by handD in the space provided to recelve ful marks (r

Question

TION Shone all your work (by handD in the space provided to recelve ful marks (ronal-16 mark) or 150 students took a final examination in mathematics. The mean score was T2% wddn deviation was 14%. Determine the percentile rank ofa score of 80%.ssamingthut marks were deviation of i5. A genius is someone with an 1O greater than 135. What percentage of the population is considered genius? .8643 8819 a 22 IQ scores of people around the world are normally distributed, with a mean of 100 and a standard 92 09 2 0.93 0.956 9719 26 C 2.99 09s the normal approximation to calculate the probability that a search of 500 randomly selected vehicles will find fewer than 85 with undeclared goods. It is estimated that 10% of the vehicles entering Canada from the United States carry undeclared goods

Explanation / Answer

Solution2:

mean=100

sd=15

X=135

need to find

P(X>135)

z=x-mean/sd

=135-100/15

Z=2.33

P(Z>2.33)

=1-P(Z<2.33)

=1-0.9901

=0.0099

=0.0099*100=0.99%

0.99% considered genius

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