2) 5, 28, 16, 32,5, 16, 48, 29, 5, 35
Mean:?
Median:?
Mode:?
Range:?

Mean: 21.9, Median: 22, Mode: 5

Step-by-step explanation:

Mean: add up all numbers and divide by how many there are.

5+28+16+32+5+16+48+5+35 = 219.  There are 10 numbers, so the mean is 219/10 = 21.9.

Median: the number in the middle of a sorted list (put in order)

5, 5, 5, 16, 16, 28, 29, 32, 35, 48

There is no number in the middle (there is an even number of numbers), so you make one up by averaging the two nearest the middle.

(16 + 28) / 2 = 44 / 2 = 22

Mode: the number that occurs most often (frequently) is 5.

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:

just sum

10 + 10 = 20