A simple random sample of 10 people was asked how many first cousins they have. The results are listed below. 10, 19, 20, 13, 13, 2, 10, 8, 25, 10

What is the median number of first cousins for this sample?

7.5
10
11.5
13

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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:

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step-by-step explanation: