Suppose a poll is taken that shows that 795795 out of 15001500 randomly​ selected, independent people believe the rich should pay more taxes than they do. Test the hypothesis that a majority​ (more than​ 50%) believe the rich should pay more taxes than they do. Use a significance level of 0.05.

Respuesta :

Answer:

Yes. more than 50% is true.

Step-by-step explanation:

Given that a poll is taken that shows that 795 out of 1500 randomly​ selected, independent people believe the rich should pay more taxes than they do.

Sample proportion p = [tex]\frac{795}{1500} =0.53[/tex]

Sample size n = 1500

Hypotheses would be

[tex]H_0: p = 0.50\\H_a: p >0.50[/tex]

(Right tailed test at 5% significance level)

Std error of proportion =[tex]\sqrt{\frac{P(1-P)}{n} } =\sqrt{\frac{0.5(1-0.5)}{1500} } \\=0.0129[/tex]

Proportion difference = p-P = [tex]0.53-0.5=0.03[/tex]

Test statistic= p diff/std error = [tex]\frac{0.03}{0.0129} \\=2.33[/tex]

p value <0.05

Hence reject null hypothesis

There is significant difference in the two proportions and hence  a majority​ (more than​ 50%) believe the rich should pay more taxes than they do is supported by statistical evidence.