Hospital admissions for asthma in children younger than years was studied in scotland both before and after comprehensive smoke-free legislation was passed in march 2006. monthly records were kept of the annualized percent change in asthma admissions, both before and after the legislation was passed. for the sample studied, before the legislation, admissions for asthma were increasing at a mean rate of per year. the standard error for this estimate is per year. after the legislation, admissions were decreasing at a mean rate of per year, with a standard error for this mean of . in both cases, the sample size is large enough to use a normal distribution.

a. find and interpret a 95% confidence interval for the mean annual percent rate of change in childhood asthma hospital admissions in scotland before the smoke-free legislation·3.8% per year to 6.6% per year
b. find a 95% confidence interval for the same quantity after the legislation-21.7% per year to-14.7% per year
c. is this an experiment or an observational study?
d. the evidence is quite compelling. can we conclude cause and effect?

answer: yes, since the line has a steeper rate of change than the exponential the y-values will be greater and they will only intersect one time.

answer: 5

step-by-step explanation:

since, the range is the difference between the lowest and highest values of the given sample space.

and, here the sample space = { 3, 1, 0, 4, 1, 4, 2, 3, 0, 5, 0, 1, 1, 2, 0, 4, 1,4, 4 ,2 ,3 ,2 ,0 ,1 ,4 }

here, the highest value of the given sample = 5

and, the lowest value = 0

therefore, the range of the sample space = 5 - 0 = 5

unless you made a typo, the answers are both a and c.

step-by-step explanation:

1.5/3 is .5 whereas 3/9 is .3333333 not proportional

22/33 is .66666 and 4/6 is also .66666 proportional

2/4 is .5 whereas 142/213 is .66666 not proportional

14/7 is 2 and 7/3.5 is also 2 proportional

you could've also checked it by doing this simple division:

if the larger fraction divides with the smaller fraction to equal 1, it is proportional. so let me show you what i mean:

when i divide 22/33 by 4/6 i get 1, so we know it is proportional, and it is the same with 14/7 and 7/3.5. now if i divide 3/9 by 1.5/3 i get .66666 so therefore we know it is not proportional.

there are many ways to do this so i wanted to show you some possible ways.