According to Internet security experts, approximately 90% of all e-mail messages are spam
(unsolicited commercial e-mail), while the remaining 10% are legitimate. A system administrator
wishes to see if the same percentages hold true for the e-mail traffic on her servers. She randomly
selects e-mail messages and checks to see whether or not each one is legitimate. (Unless
otherwise specified, round all probabilities below to four decimal places; i.e. your answer should
look like 0.1234 , not 12.34% ). a) Assuming that 90% of the messages on these servers are also
spam, compute the probability that the first legitimate e-mail she finds is the seventh message she
checks. b) Compute the probability that the first legitimate e-mail she finds is the seventh or eighth
message she checks. c) Compute the probability that the first legitimate e-mail she finds is among
the first seven messages she checks. 04 d) On average, how many messages should she expect
to check before she finds a legitimate e-mail? (Round your answer to one decimal place.) 0
messagesWhen you post a picture on social media, it seems like your friends randomly "like" the
picture. Independent of the quality or the humor of the photo, there seems to be a 29.8% chance
of the picture being "liked" for any given picture. Let X represent the number of pictures you post
until one is "liked." (X represents the photo number that is actually liked.) Find: X: 08 X 6 P(X=5) 4
P(X<8) 08 P(X>9) P(6X8) 0sA study was conducted to determine whether there were significant
differences between medical students admitted through special programs (such as retention
incentive and guaranteed placement programs) and medical students admitted through the regular
admissions criteria. It was found that the graduation rate was 92.6% for the medical students
admitted through special programs. Be sure to enter 4 digits of accuracy for this problem! If 12 of
the students from the special programs are randomly selected, find the probability that at least 11
of them graduated. P(x11)= If 12 of the students from the special programs are randomly selected,
find the probability that at most 9 of them graduated. P(x9)= Would it be unusual to randomly
select 12 students from the special programs and get at most 9 that graduate? yes, it is unusual
no, it is not unusual.
According to Internet security experts approximately 90 of.pdf
1. According to Internet security experts, approximately 90% of all e-mail messages are spam
(unsolicited commercial e-mail), while the remaining 10% are legitimate. A system administrator
wishes to see if the same percentages hold true for the e-mail traffic on her servers. She randomly
selects e-mail messages and checks to see whether or not each one is legitimate. (Unless
otherwise specified, round all probabilities below to four decimal places; i.e. your answer should
look like 0.1234 , not 12.34% ). a) Assuming that 90% of the messages on these servers are also
spam, compute the probability that the first legitimate e-mail she finds is the seventh message she
checks. b) Compute the probability that the first legitimate e-mail she finds is the seventh or eighth
message she checks. c) Compute the probability that the first legitimate e-mail she finds is among
the first seven messages she checks. 04 d) On average, how many messages should she expect
to check before she finds a legitimate e-mail? (Round your answer to one decimal place.) 0
messagesWhen you post a picture on social media, it seems like your friends randomly "like" the
picture. Independent of the quality or the humor of the photo, there seems to be a 29.8% chance
of the picture being "liked" for any given picture. Let X represent the number of pictures you post
until one is "liked." (X represents the photo number that is actually liked.) Find: X: 08 X 6 P(X=5) 4
P(X<8) 08 P(X>9) P(6X8) 0sA study was conducted to determine whether there were significant
differences between medical students admitted through special programs (such as retention
incentive and guaranteed placement programs) and medical students admitted through the regular
admissions criteria. It was found that the graduation rate was 92.6% for the medical students
admitted through special programs. Be sure to enter 4 digits of accuracy for this problem! If 12 of
the students from the special programs are randomly selected, find the probability that at least 11
of them graduated. P(x11)= If 12 of the students from the special programs are randomly selected,
find the probability that at most 9 of them graduated. P(x9)= Would it be unusual to randomly
select 12 students from the special programs and get at most 9 that graduate? yes, it is unusual
no, it is not unusual
