Table:
characteristic
total
boys
girls

estimate
95% confidence interval
estimate
95% confidence interval
estimate
95% confidence interval

from
to
from
to
from
to

wear time
12.0
11.7
12.2
11.9
11.6
12.2
12.0
11.8
12.3

sedentary time
436
425
447
432
416
448
440
428
453

light physical activity
213
206
219
210
203
217
215
206
225

moderate-to-vigorous physical activity
69
66
72
71
68
74
66
62
70

total physical activity
283
274
291
282
274
291
283
271
295

total counts per day
269,819
257,280
282,359
275,473
261,460
289,486
263,815
247,749
279,881

average screen time
2.0
1.8
2.2
2.1
1.8
2.4
2.0
1.7
2.3

height
102.9
101.9
104.3
103.8
102.5
105.7
102.0
100.3
104.3

weight
17.3
16.9
17.9
17.9
17.3
18.6
16.8
16.1
17.8

body mass index
16.3
16.1
16.5
16.5
16.1
17.0
16.1
15.8
16.5

household income

$0 to $39,999
20.8
13.2
28.4
24.7
15.0
34.5
16.6
7.3
25.9

$40,000 to $79,999
29.3
22.9
35.7
28.0
19.6
36.4
30.7
23.2
38.1

$80,000 or more
49.9
39.5
60.4
47.3
34.8
59.7
52.8
40.4
65.1

highest level of education in household

secondary graduation or less
13.2
9.5
16.9
9.1
5.5
12.8
17.5
11.0
23.9

at least some postsecondary, less than bachelor's degree
38.3
30.5
46.2
41.5
31.8
51.2
35.0
25.2
44.7

bachelor's degree
29.2
23.3
35.2
28.0
18.8
37.1
30.6
23.1
38.0

university degree or certificate above bachelor's degree
18.6
11.7
25.6
20.3
11.4
29.2
16.9
9.5
24.4

body mass index category

healthy weight
66.2
60.5
71.9
63.3
57.0
69.6
69.2
59.5
78.9

at risk of overweight
25.4
19.8
31.1
26.8
19.4
34.1
24.0
16.3
31.8

overweight or obese
7.7
4.2
11.1
8.6
4.5
12.7
f
..
..

single-child household

yes
18.7
13.5
23.9
20.0
13.4
26.6
17.4
9.7
25.1

mother's age at birth of child

younger than 30
40.4
33.4
47.4
41.6
32.5
50.6
39.2
29.1
49.2

30 to 34
35.7
28.9
42.5
38.4
28.2
48.6
32.8
23.6
42.0

35 or older
23.9
18.6
29.1
20.0
12.6
27.5
27.9
16.6
39.2

Statement: the total three-to-4-year-olds wore the accelerometer an average of 12 hours on valid days.
Question: how many hours did the total three-to-4-year-olds were the accelerometer on valid days?
Answer: [12.0]