2.2 Practice - Vaccinations Report - Python for Data Science

Question

We have a report on the number of flu vaccinations in a class of 20 people.

It has the following numbers:
never: 5
once: 8
twice: 4
3 times: 3

What is the mean number of times those people have been vaccinated?
Output the result using the print() statement

Hint: Think about the data this way: it contains 20 values, each representing the number of vaccinations the corresponding person had.

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This is introductory but I can't figure out the solution. Could you please help me?

Neither line seems to work for the hidden case:

print( (5+8+4+3) / 4 )
print( (5+8+4+3) / 20 )

Answer 1

Thanks Jerry Hobby, good point. I tried this but it doesn't work either:

print( (0*5) + (1*8) + (2*4) + (3*3) / 4 )

What am I missing to find the mean of the number of flu vaccinations for 20 people?

Answer 2

Yes you can try making a dict of values and append the values to the are and find the avg👌

Something like

nums={0:5,1:8,2:4,3:3}

# since 5 is once,8 is twice and so on..

arr=empty list

for key,val in nums.items():
for i in range(key):
append values to arr

#arr will be equal to [8,4,4,3,3,3]

#mean

print(sum(arr)/20)

Answer 3

[1] vac_nums = [0,0,0,0,0,
1,1,1,1,1,1,1,1,
2,2,2,2,
3,3,3]

[2] [vac_nums.count(x) * x for x in set(vac_nums)]

>>> [0, 8, 8, 9]

[3] len(vac_nums)

>>>> 20

[4] sum([vac_nums.count(x) * x for x in set(vac_nums)]) / len(vac_nums)

>>>> 1.25

Answer 4

Simply to find the mean, just do the following equation: print((8+8+9)/20)
Since one time vaccination: 8
Since two times vaccination: 4 x 2 = 8
Since three times vaccination: 3 x 3 = 9
Add them all together and then divide by the total number of students which is 20.
This should help.

Answer 5

You aren’t adding up twenty numbers. Repeat the numbers the specified number of times.

Answer 6

Divide by 20?

Answer 7

never=[0,0,0,0,0]
once=[1,1,1,1,1,1,1,1]
twice=[2,2,2,2]
third=[3,3,3]
total=never+once+twice+third
sum(total)/20