35 minutes because 45-10 =35
Answer:
Step-by-step explanation:

Pooled proportion

The hypothesis null would be

Alternate can be either not equal to or < or > according to need
Std error for difference of proportions

Hence test statistic = p difference/std error
= 
where p is given as above as combined proportion.
Answer: i think it is about 3.6%
Step-by-step explanation: