Answer:
that's muddled up I can't make out the question
It is B- An L-type cylinder head.
Answer:
The answer is "
"
Explanation:
Calculating the mean for brand A:
Calculating the Variance for brand A:


Calculating the Standard deviation:
Calculating the Mean for brand B:
Calculating the Variance for brand B:


Calculating the Standard deviation:

• Installed a program containing ransomware/malware. (Do not accept downloaded without inferring it was installed)
• Opened an email attachment containing malware.
• Opened a file containing a malicious macro.
• Left his computer unsecure allowing someone else to install malware on it. (Should include an example, e.g. not logging off)