Khan academy: Help!! The two way frequency table below shows data on grade level and method of traveling to school for the students at central high school
Choose 1:
(A) a 10th grade student is more likely to travel by bike then by car
(B) less than 1/2 of the 11th grade students travel by car
(C) 11th grade students are more likely than 9th grade students to travel by bike
(D) the most students are in 11th grade

5 meters per second

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step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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2,160 π

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