Can somone please tell me the answer PLEASE the 65 in the red box at the bottom right means thats my smart score and...the other photo you should be able to see i need an 80, scores go up little by little when you get each question right what i need is this right so i can get my smart score up to 80%, ill need help with others similer to that to

mina li

Step-by-step explanation:

ok

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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