A drug is used to help prevent blood clots in certain patients. In clinical trails, among 4469 patients treated with the drug, 110 developed the adverse reaction of nausea. Construct a 99% confidence interval for the proportion of adverse rea

In a study of the use of hypnosis to relieve pain, sensory ratings were measured for 8 subjects and the mean sensory ratings was found to be 2.8 and standard deviation to be 0.3. The sensory ratings are normally distributed. The 80% confidence interval for the mean sensory ratings of the population is (9.35,11.65) b. (3.58, 4.64) (2.65, 2.95) d. (3.09, 3.91) (6.27, 8.73) a. C. e.

a group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 5.2 on a placement test. what is the 90% confidence interval for the mean score, u, of all students taking the test?

A random sample of high school seniors were asked whether they were applying for college. The resulting confidence interval for the proportion of students applying for college is (0.65,0.69). What is the margin of error?

A random sample of college students were asked whether they study more than four hours per week in the library. The resulting confidence interval for the portion of college students who study more than four hours in the library is (0.45, 0.79). What is the margin of error?

Out of 3064 respondants, 919 of them said they have a dog. Using this data, compute a 95% confidence interval for the true proportion of people who own a dog.

Wildlife biologists inspect 180 deer taken by hunters and find 36 of them carrying Lyme disease ticks. Calculate a 95% confidence interval for the proportion of deer that carry Lyme disease ticks.

Many teens have posted profiles on sites such as Facebook. A sample survey asked random samples of teens with online profile if they included false information in their profiles. Of 170 younger teens (ages 12 to 17) polled, 117 said "Yes." Of 317 older teens (ages 15 to 17) polled, 152 said "Yes." A 95% confidence interval for py - Po = the true difference in the proportion of younger teens and older teens who include false information in their profile is 0.12 to 0.297. Does the confidence interval give convincing evidence of a difference in the true proportions of younger and older teens who include false information in their profiles? Explain your answer. O Even though this confidence interval does not include 0, this might not occur again in different samples. There is not enough evidence to make a conclusion regarding the true difference in the proportion of younger teens and older teens who include false information on their profiles. No. We are 95% confident that the interval…

To estimate the proportion of students who purchase their textbooks used, 500 students were sampled. 210 of these students purchased used textbooks. Find a 99% confidence interval for the proportion of students who purchase used text books.