(a)Ho: 22.5, Ha: > 22.5; x 25.6, o=B, n-27 Calculate the test statistic z. (Give

Question

(a)Ho: 22.5, Ha: > 22.5; x 25.6, o=B, n-27 Calculate the test statistic z. (Give your answer correct to two decirnal places.) (i) Calculate the p-value. (Give your answer correct to four decimal places.) (i) Calculate the test statistic z. (Give your answer correct to two decimal places.) (ii) Calculate the p-value. (Give your answer correct to four decimal places.) (c) Ho: : 12.4. Hai -12.4: x"10.3, -3.9, n-27 Calculate the test statistic z. (Give your answer correct to two decimal places.) () Calculate the p-value. (Give your answer correct to four decimal places.) You may need to use the e table in Appendix B to answer this question

Explanation / Answer

a) std error =std deviation/(n)1/2 =8/(27)1/2 =1.5396

hence test stat z =(X-mean)/std error =(25.6-22.5)/1.5396 =2.01

p value =0.0220

b)

std error =std deviation/(n)1/2 =31/(34)1/2 =5.3165

hence test stat z =(X-mean)/std error =(192.2-200)/5.3165 =-1.47

p value =0.0712

c)

std error =std deviation/(n)1/2 =3.9/(27)1/2 =0.7506

hence test stat z =(X-mean)/std error =(10.3-12.4)/0.7506 =-2.80

p value =0.0051

please revert for any clarification required

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