The claim is that the proportion of peas with yellow pods is

The claim is that the proportion of peas with yellow pods is equal to 0.25 (or 25%). The sample statistics from one experiment include 450peas with132of them having yellow pods.

Find the value of the test statistic.The value of the test statistic is _______?

Solution

Formulating the null and alternatuve hypotheses,          
          
Ho:   p   =   0.25
Ha:   p   =/=   0.25

As we see, the hypothesized po =   0.25      

Getting the point estimate of p, p^,          
          
p^ = x / n =    0.293333333      
          
Getting the standard error of p^, sp,          
          
sp = sqrt[po (1 - po)/n] =    0.020412415      
          
Getting the z statistic,          
          
z = (p^ - po)/sp =    2.12289111   [ANSWER]