What is a density curve?
choose the correct answer below.
a. a density curve of a variable represents the approximate distribution of a continuous variable.
b. a density curve of a variable is a smooth curve with which one can identify the shape of the distribution of the variable.
c. a density curve of a variable is any type of curve which represents the distribution of the variable.
d. a density curve of a variable represents the distribution of a discrete variable.

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step-by-step explanation:

stops on an even number.

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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step-by-step explanation: