me security of two software systems are compared. A total of 225 security tests (fake attacks) were carried out on System 1 and, in 80 of them, the naffected. On the other hand, 150 tests were conducted on System 2 and, in 30 of them, the system remained unaffected. Help test engineers dec eaningful difference between the security levels of two systems (measured by the proportion of unsuccessful attacks) by building a confidence inte Elick here to view page 1 of the standard normal distribution table Click here to view page 2 of the standard normal distribution table With 99% confidence, the engineers can conclude that the difference among security levels p, - P2 will be between and (Round to three decimal places including any zeros) Obviously, the interval ▼ This means, the case p1- P2 =0 v excluded from 99% of all possible values p, - P2 can ta contains does not contain

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The security of two software systems are compared. A total of 225 security tests (fake attacks) were carried out on System 1 and, in 80 of them, the system was
unaffected. On the other hand, 150 tests were conducted on System 2 and, in 30 of them, the system remained unaffected. Help test engineers decide whther there is a
meaningful difference between the security levels of two systems (measured by the proportion of unsuccessful attacks) by building a confidence interval.
Click here to view page 1 of the standard normal distribution table.
Click here to view page 2 of the standard normal distribution table.
the
With 99% confidence, the engineers can conclude that the difference among security levels p, - p2 will be between and
atio
(Round to three decimal places including any zeros.)
1- Obviously, the interval
This means, the case p, -P2 =
V excluded from 99% of all possible values p, - p2 can take.
contains
(9-1
does not contain
( 6. 6
ence ti
opulatio
Enter your answer in the edit fields and then click Check Answer.
Clear All
Check Antwe
All parts showing
124
^4) TUR
541
Transcribed Image Text:Question Help ▼ The security of two software systems are compared. A total of 225 security tests (fake attacks) were carried out on System 1 and, in 80 of them, the system was unaffected. On the other hand, 150 tests were conducted on System 2 and, in 30 of them, the system remained unaffected. Help test engineers decide whther there is a meaningful difference between the security levels of two systems (measured by the proportion of unsuccessful attacks) by building a confidence interval. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. the With 99% confidence, the engineers can conclude that the difference among security levels p, - p2 will be between and atio (Round to three decimal places including any zeros.) 1- Obviously, the interval This means, the case p, -P2 = V excluded from 99% of all possible values p, - p2 can take. contains (9-1 does not contain ( 6. 6 ence ti opulatio Enter your answer in the edit fields and then click Check Answer. Clear All Check Antwe All parts showing 124 ^4) TUR 541
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