Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence interval of when estimating the mean height (in centimeters) of a sample of seedlings. The estimated margin of error is nothing. The sample mean is nothing.

Complete Question

A biologist reports a confidence interval of (3.5,4.9) when estimating the mean height (in centimeters) of a sample of seedlings. What is the estimated margin of error and the sample mean?

The  margin of error is  

The  sample mean is  

Step-by-step explanation:

from the question we are told that

   The  upper limit is  

    The  lower limit is  

Generally the margin of error is mathematically represented as

Generally the sample mean is mathematically evaluated as

=>    

=>    

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

the solution is h=10 because you add 9 to each side of the equation.