15. A report indicated that 43% of adults had received a "phishing" contact (a bogus email that replicates an authentic site for the purpose of stealing personal information such as account numbers and passwords). Suppose a random sample of 800 adults is obtained. a) What is the probability that no more than 40% have received a phishing contact? b) What is the probability that between 37% and 42% have received a phishing contact?
Added by Javier M.
Close
Step 1
800 adults Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 63 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
In a survey of U.S. adults, 16.2361% say they have had someone take over their email accounts without their permission. You randomly select 250 U.S. adults and ask them whether they have had someone take over their email accounts without their permission. Find the probability that the number of U.S. adults who say they have had someone take over their email accounts without their permission is: a) less than 45 b) at most 40 c) exactly 48
Sri K.
It is estimated that two out of five high school students would fall victim to a phishing e-mail (an online scam asking for sensitive information) if it appears to originate from their high school main office. What is the probability that the first student to fall victim will be the third student who is sent a phishing e-mail that appears to originate from their high school main office? (A) $(0.4)^{3}$ (B) $(0.6)^{3}$ (C) (0.6)$(0.4)^{2}$ (D) $(0.6)^{2}(0.4)$ (E) $\left(\begin{array}{l}5 \\ 2\end{array}\right)(0.6)^{2}(0.4)$
Probability, Random Variables, and Probability Distributions
Quiz 18
Frank D.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD