Mathematics, 18.03.2020 01:23 tinaxiao
First Data Corp. records indicate that in 2005, 43% of adult email users received a phishing email. A phishing email replicates an authentic site for the purpose of stealing personal information such as account numbers and passwords. Suppose a random sample of 800 adults will be surveyed on whether they have received phishing emails to determine recent trends.
a. Give the mean and standard deviation of the sample distribution of that.
b. What is the z-score for a 45% probability?
c. What is the probability that more than 45% of those in a survey would have received a phishing email?
Answers: 2
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First Data Corp. records indicate that in 2005, 43% of adult email users received a phishing email....
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