test for a certain disease is found to be 95% accurate, meaning
that it will correctly...
test for a certain disease is found to be 95% accurate, meaning
that it will correctly diagnose the disease in 95 out of 100 people
who have the ailment. The test is also 95% accurate for a negative
result, meaning that it will correctly exclude the disease in 95
out of 100 people who do not have the ailment. For a certain
segment of the population, the incidence of the disease is 4%.
(1) If a person tests positive, find...
1. A certain medical test is known to detect 47% of the people
who are afflicted...
1. A certain medical test is known to detect 47% of the people
who are afflicted with the disease Y. If 10 people with the disease
are administered the test, what is the probability that the test
will show that:
All 10 have the disease, rounded to four decimal places?
At least 8 have the disease, rounded to four decimal places?
At most 4 have the disease, rounded to four decimal places?
2.
A certain medical test is known to...
A student has the following assignment grades: 85, 92, 72, 69,
74, 96, 83, 76, 72,...
A student has the following assignment grades: 85, 92, 72, 69,
74, 96, 83, 76, 72, 97. Find the mean, mode, and the five-number
summary. Round to one decimal
Find the mean and the standard deviation of the following quiz
scores:
21, 20, 23, 15, 16. Round to one decimal.
15,000 students take a national test. The results are normally
distributed with a mean of 400 and a standard deviation of 120.
Approximately how many students scored between 400 and...
Suppose that, on average, it is known that a certain TV part
lasts α years. The...
Suppose that, on average, it is known that a certain TV part
lasts α years. The length of time the TV part lasts is
exponentially distributed. A study shows that 80% of these parts
last longer than 2 years. (a) What is the probability that one of
these parts will last at least 3 years? (b) 90% of these parts will
last at least ____ years. (c) What is the probability that one of
these parts will last between one...