Question
In: Statistics and Probability
After a campaign to encourage students to take precautions against skin cancer, in a certain high...
After a campaign to encourage students to take precautions against skin cancer, in a certain high school class consisting of 34 girls and 39 boys, it is observed that 26 girls and 25 boys take precautions as measured by a survey to elicit how often they wear sunscreen, sunglasses and hats for protection against the sun.
Please use this information to calculate the probabilities for the following questions. Please provide each numerical answer to TWO DECIMAL places (X.XX) with no additional information in the answer box. Just X.XX (i.e. no extra spaces, no units, etc).
What is the probability that a student picked at random takes precautions against skin cancer (by wearing sunscreen, sunglasses and a hat), given that the student is a boy?
Solutions
Expert Solution
Total students = 34 + 39 = 73
P(takes precautions against skin cancer | boy) = P(boy and takes precuations) / P(boy)
= (25/73) / (39/73)
= 25 / 39
= 0.64 (ans)
orchestra answered 1 year agoRelated Solutions
In a certain high school, uniforms are optional. A study shows that high school students who...
In a certain high school, uniforms are optional. A study shows
that high school students who wear uniforms have a lower grade
average than students who don't wear uniforms. From this study, the
school administration claims that they should not require the
students to wear uniforms because that is the cause of the lowering
grades. Another possible explanation is that students who wear
uniforms are poorer than the students who don't wear uniforms and
the economic situation of their parents...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations
at a certain high school had a normal distribution with mean μ=544
and standard deviation σ=29.1.
(a) What is the probability that a single student randomly
chosen from all those taking the test scores 548 or higher?
For parts (b) through (d), consider a simple random sample (SRS)
of 35 students who took the test.
(b) What are the mean and standard deviation of
the sample mean score x¯, of...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations
at a certain high school had a normal distribution with mean
?=545.8μ=545.8 and standard deviation ?=28.4σ=28.4.
(a) What is the probability that a single student, randomly
chosen from all those taking the test, would score 552 or
higher?
For parts (b) through (d), consider a simple random sample (SRS)
of 35 students who took the test.
(b) What are the mean and standard deviation of the sample mean
score ?¯x¯,...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations
at a certain high school had a normal distribution with
mean and standard deviation .
(a) What is the probability that a single student randomly
chosen from all those taking the test scores 545 or higher?
ANSWER:
For parts (b) through (d), consider a simple random sample (SRS) of
30 students who took the test.
(b) What are the mean and standard deviation of the sample mean
score , of 30...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations
at a certain high school had a normal distribution with mean
μ=535.4 and standard deviation σ=28.
(a) What is the probability that a single student randomly
chosen from all those taking the test scores 542 or higher?
ANSWER:
For parts (b) through (d), consider a simple random sample (SRS) of
25 students who took the test.
(b) What are the mean and standard deviation of the sample mean
score x,...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations
at a certain high school had a normal distribution with mean
μ=531.5μ=531.5 and standard deviation σ=29.6σ=29.6.
(a) What is the probability that a single student randomly
chosen from all those taking the test scores 536 or higher?
ANSWER:
For parts (b) through (d), consider a random sample of 25 students
who took the test.
(b) What are the mean and standard deviation of the sample mean
score x¯x¯, of 25...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations
at a certain high school had a normal distribution with mean
μ=553.4μ=553.4 and standard deviation σ=29.3σ=29.3.
(a)What is the probability that a single student randomly chosen
from all those taking the test scores 560 or higher?
For parts (b) through (d), consider a simple random sample (SRS)
of 35 students who took the test.
(b)What are the mean and standard deviation of the sample mean
score x¯x¯, of 35 students?...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations
at a certain high school had a normal distribution with mean
μ=542.7 and standard deviation σ=29.8.
(a) What is the probability that a single student randomly
chosen from all those taking the test scores 546 or higher?
ANSWER:
For parts (b) through (d), consider a simple random sample (SRS) of
35 students who took the test.
(b) What are the mean and standard deviation of the sample mean
score x¯,...
The scores of students on the SAT college entrance examinations at a certain high school had...
The scores of students on the SAT college entrance examinations
at a certain high school had a normal distribution with mean
μ=548.8μ=548.8 and standard deviation σ=26.4σ=26.4.
(a) What is the probability that a single student randomly
chosen from all those taking the test scores 555 or higher?
ANSWER:
For parts (b) through (d), consider a simple random sample (SRS) of
35 students who took the test.
(b) What are the mean and standard deviation of the sample mean
score x¯x¯,...
Students were given a pre-test. Then after they listened to a certain type of music they...
Students were given a pre-test. Then after they listened to a
certain type of music they were given a similar post test. If we
define the difference as the post test score minus the pre test
score and we find a 95% confidence interval for the mean of the
differences to be [-1.34, 4.56]. Which of the following is true? It
seems like music has affected the scores and the post test scores
are significantly higher. It seems like music...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- 1. The empirical rule says that 95% of the population is within 2 standard deviations of...
- What are some adaptive traits for tigers what are some adaptations of a tiger
- Question I'm having trouble with: Using LISP, write a recursive function that takes a list and...
- Gatekeeping: What are the causal effects of AI (Artificial Intelligence) in hiring processes and how can...
- Write code that would go where the comment "#your line will go here" so that the...
- The tires of a car make 78 revolutions as the car reduces its speed uniformly from...
- Cornerstone Exercise 4.1 (Algorithmic) Applied Overhead and Unit Overhead Cost: Plantwide Rates Seco, Inc., produces two...
ADVERTISEMENT