.Use scientific method 5 parts In 1997, a survey of 900 households showed that 1

Question

.Use scientific method 5 parts

In 1997, a survey of 900 households showed that 136 of them use e-mail. Use those sample results to test the claim that more than 15% of households use e-mail. Use a 0.05 significance level. Use this information to answer the following questions. a. Which of the following is the hypothesis test to be conducted?

A. H0: p=0.15 H1: p0.15

B. H0: p0.15H1: p=0.15

C. H0: p=0.15 H1: p>0.15

D. H0: p>0.15 H1: p=0.15

E. H0: p<0.15 H1: p=0.15

F. H0: p=0.15 H1: p<0.15

b. What is the test statistic? z=_____(Round to two decimal places as needed.)

c. What is the P-value? P-value=_____m (Round to three decimal places as needed.)

d. What is the conclusion? Pick A or B

A.There is sufficient evidence to support the claim that more than 15% of households use e-mail.

B.There is not sufficient evidence to support the claim that more than 15% of households use e-mail. e.

Is the conclusion valid today? Why or why not? Pick A, B or C

A. Yes, the conclusion is valid today because the requirements to perform the test are satisfied.

B. No, the conclusion is not valid today because the population characteristics of the use of e-mail are changing rapidly.

C. You can make no decisions about the validity of the conclusion today.

Please pay attention to the answers .. ty

Explanation / Answer

a)C. H0: p=0.15 H1: p>0.15

std error =(p(1-p)/n)1/2 =0.0119

phat=136/900 =0.1511

b)hence test stat =(phat-p)/std error =0.0934

c) p value =0.4628

d)There is not sufficient evidence to support the claim that more than 15% of households use e-mail. e.

e)No, the conclusion is not valid today because the population characteristics of the use of e-mail are changing rapidly.

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