A school administrator wants to see if there is a difference in the number of students per class for Portland Public Sch
Posted: Wed May 11, 2022 6:58 pm
A school administrator wants to see if there is a difference in
the number of students per class for Portland Public School
district (group 1) compared to the Beaverton School district (group
2). Assume the populations are normally distributed with unequal
variances. A random sample of 26 Portland classes found a mean of
36 students per class with a standard deviation of 3. A random
sample of 28 Beaverton classes found a mean of 32 students per
class with a standard deviation of 5.
Find a 90% confidence interval in the difference of the
means. Note: If you do not have a Ti-84 and the degrees of
freedom is not on Table F, then please use the =T.INV(Area to
left,df) function in GoogleSheets to find the critical value to 3
decimal places. Round your interval end points to the nearest whole
number.
the number of students per class for Portland Public School
district (group 1) compared to the Beaverton School district (group
2). Assume the populations are normally distributed with unequal
variances. A random sample of 26 Portland classes found a mean of
36 students per class with a standard deviation of 3. A random
sample of 28 Beaverton classes found a mean of 32 students per
class with a standard deviation of 5.
Find a 90% confidence interval in the difference of the
means. Note: If you do not have a Ti-84 and the degrees of
freedom is not on Table F, then please use the =T.INV(Area to
left,df) function in GoogleSheets to find the critical value to 3
decimal places. Round your interval end points to the nearest whole
number.