According to a Wired magazine article, of e-mails that are received are tracked using software that can tell the e-mail sender w
hen, where, and on what type of device the e-mail was opened (Wired magazine website). Suppose we randomly select received e-mails.
1 answer:
Answer:
a. 12
b. 7.200 and 2.683
Step-by-step explanation:
The computation is shown below:
Given that
P = 0.40 and n = 30
a)
The expected value of received e-mails is
= n × p
= 30 × 0.4
= 12
b)
The variance of emails received is
= n × p × (1 - p)
= 30 × 0.4 × 0.6
= 7.200
Now
The standard deviation of emails received is
= sqrt(variance)
= 2.683
We simply applied the above formula
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