Arandom sample of n=1400 registered voters and found that 720 would vote for the republican candidate in a state senate race. let p represent the proportion of registered voters who would vote for the republican candidate.
consider testing

h0: p=.50
ha: p> .50

(a) the test statistic is z =

(b) regardless of what you acutally computed, suppose your answer to part (a) was z = 1.28. using this z, p-value =

1.070,0.1003

Step-by-step explanation:

Given that a random sample of n=1400 registered voters and found that 720 would vote for the Republican candidate in a state senate race.

p =  the proportion of registered voters who would vote for the Republican candidate.

Sample proportion =

Hypotheses are:

(Right tailed test )

p difference =

Assuming null hypothesis to be true,

Std error =

a) Test statistic Z = p difference/std error = 1.070

b) When z =1.28, p value = 0.100273