To construct a confidence interval using the given confidencelevel, do whichever of the following is appropriate.(a) Find the critical value z Subscript alpha divided by 2

z/2, (b) find the critical value t Subscript alpha divided by 2

t/2, or(c) state that neither the normal nor the t distribution applies.

99%; n equals

=300

300; sigma is unknown

isunknown; population appears to be skewed