In a random sample of 340 export managers in Malaysia, 61 of the sample members indicated some measure of disagreement with this statement: The most important export market for Malaysian manufacturers...

In a random sample of 340 export managers in Malaysia, 61 of the sample members indicated some measure of disagreement with this statement: The most important export market for Malaysian manufacturers in 10 years’ time will be Europe.
a. Test, at the 5% level, the null hypothesis that at least 25% of all members of this population would disagree with this statement.
b. Find the probability of rejecting the null hypothesis with a 5% level test if, in fact, 20% of all members of this population would disagree with the statement.