2. A company that supports two different types of computer networks is interested in comparing the mean down time for the two types. A random sample of 10 networks from the first type and another random sample of 16 networks from the second type are selected and the down time in hours (over a one-year period) is recorded for every network. The results are given in the table below

Type1 Type 2
Sample mean 83.5 69.4
Sample standard deviation 34.2 22.3

a) Is there a significant difference in the mean down time between the two types of networks? Use (alpha)=0.01. State your assumptions

Question

2.	A company that supports two different types of computer networks is interested in comparing the mean down time for the two types. A random sample of 10 networks from the first type and another random sample of 16 networks from the second type are selected and the down time in hours (over a one-year period) is recorded for every network. The results are given in the table below

Type1 Type 2 
Sample mean 83.5 69.4 
Sample standard deviation 34.2 22.3 

a)	Is there a significant difference in the mean down time between the two types of networks? Use (alpha)=0.01. State your assumptions