Question 1176420
p hat is 0.31016
assuming random sample etc.,
the test statistic is z=(p hat-p)* sqrt(p(1-p)/n) with critical value of z < -1.645 for a 1 way test
=-0.01984/sqrt(0.33*0.67/2215); sqrt term is 0.01
=-1.984
reject Ho and the number has decreased at the 1% level.
p-value=0.0236.
Note: where you round determines the last digit at the ten-thousandth place.