7.44-6.26=1.18
1.18 in minutes is 78 minutes bc 1 hour is 60 minutes + 18 minutes is 78
Hope this helps :D
The ricipricals are 3/8 and 2/13
Solution :
This is the two tailed test.
The null hypothesis and the alternate hypothesis is as :
Null hypothesis is 
Alternate hypothesis is 

Therefore, the critical value of z is :

Now the test statics is :



The test statics is 0.878
We see that it is a right tailed test.


= 0.3800
Thus , P-value > α
So we fail to reject the null hypothesis.