With data from the 2009 national health interview survey, the centers for disease control estimated that 9.4% of u. s. children had asthma. suppose that 12% of a random sample of 500 u. s. poor children have asthma.
we used the estimate from the 2009 national health interview survey to calculate a standard error of 0.013. the data allows the use of a normal model. so we can find an approximate 95% confidence interval for the percentage of all u. s. poor children who have asthma.
which interval is the approximate 95% confidence interval?
0.107 to 0.133
0.094 to 0.146
0.026 to 0.214
0.068 to 0.12

95% confidence interval is 0.094 to 0.146

Step-by-step explanation:

Confidence Interval can be calculated using p±ME where

And margin of error can be stated as ME=z×SE where

Then ME=1.96×0.013≈0.0255

Finally, 95% confidence interval is 0.12±0.0255 ≈ 0.094 to 0.146

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles