Refer to the accompanying data display that results from a sample of airport data speeds in mbps. complete parts (a) through (b)
(13.046,22.15)
x = 17.598
sx = 16.017121719
n = 50
a.)what is the number of degrees of freedom that should be used for finding the ctrical value t a/2? df=
b.) find the critical value t a/2 correspodingto a 95% confidence level.
c.) give a brief general description of the number of degrees of freedom.
a.) the number of degrees of freedom for a collection of ample data is the total number of sample vaules.
b.) the number of degrees for freedom for a collection of sample vaulesthat can vary after certain restrictions have been imposed on all data vaules.
c.) the number of degrees of freedom for a collection of sample data is number of unique, non-repeated sample values.
d.) the number of degrees of freedom for a collection of sample data is the number of samplevaules that are determnied after certain restrictions have been imposed on all data vaules.