Question
In: Statistics and Probability
The following data show the number of hours per day 12 adults spent in front of...
The following data show the number of hours per day
12 adults spent in front of screens watching television-related content. Complete parts a and b below.
|
1.31.3 |
4.84.8 |
4.34.3 |
4.94.9 |
7.67.6 |
6.96.9 |
|
|
5.45.4 |
3.33.3 |
5.15.1 |
1.11.1 |
2.12.1 |
8.18.1 |
|
a.a. |
Construct a 95% confidence interval to estimate the average number of hours per day adults spend in front of screens watchingtelevision-related content. |
The 95% confidence interval to estimate the average number of hours per day adults spend in front of screens watchingtelevision-related content is from nothing hours to___nothing ___hours.
Solutions
Expert Solution
Let X be the time (hrs per day) spent in front of screens watching television-related content by adults.
given data is
| X |
| 1.3 |
| 4.8 |
| 4.3 |
| 4.9 |
| 7.6 |
| 6.9 |
| 5.4 |
| 3.3 |
| 5.1 |
| 1.1 |
| 2.1 |
| 8.1 |
By using excel function:
"=AVERAGE(A2:A13)"
"=STDEV(A2:A13)"
s=2.3105 ## standard deviation.
The 95% confidence interval to estimate the average number of hours per day adults spend in front of screens watchingtelevision-related content given by:
## by using t table t0.025,11=2.201
Hence The 95% confidence interval to estimate the average number of hours per day adults spend in front of screens watchingtelevision-related content is from 3.107 hrs to 6.03 hrs.
orchestra answered 1 year agoRelated Solutions
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