Some help with 3 college statistics true and false?

any help would be very much appreciated.





1) As long as each cell has an observed frequency of at least 5, sample size has no effect on the significance of the goodness of fit x^2 test. True or False





2) The proportion of SS(sub)y that is not predicted by the regression equation is equal to r^2. True or False





3) If the confidence interval for 渭 is from 40 to 50, then the sample mean must be M=45. true or false





thanks in advance. happy holidays!Some help with 3 college statistics true and false?
1 ) T





2 ) F





3 ) T