Question

Hypothesis testing, six steps. can you calculate. because this topic wil be asked to me in the exam. which total marks 10. thanx

Answer 1

Sol:

Sol:

Its a hypothesis test for single mean

Null hypothesis

Ho:

Alternative hypothesis

Ha:

alpha=0.05

test statistic is

t=xbar-mu/s/sqrt(n)

t=(71-69.6)/(2.9326/sqrt(11))

t=1.5833

degrees of freedom=n-1=11-1=10

p value can be found in excel as

=T.DIST.RT(1.5833;10)

=0.072217708

p=0.0722(to 4decimals)

statistical decision:

p=0.0722

alpha=0.05

p>alpha

since p value is greater than alpha,Fail to reject null hypothesis

Accept Null hypothesis.

Conclusion:

There is no sufficient statistical evidence at 5% level of significance to conclude that the mean height for the young men at the university is larger than average.

69.6