Jrorockets893 Jrorockets893

27-10-2022
Mathematics

Answered

a medical researcher wants to investigate the amount of time it takes for patients' headache pain to be relieved after taking a new prescription painkiller. she plans to use statistical methods to estimate the mean of the population of relief times. she believes that the population is normally distributed with a standard deviation of 22 minutes. how large a sample should she take to estimate the mean time to within 2 minutes with 95% confidence?

Answer :

Other Questions

the charge life of a certain lithium-ion battery for camcorders is normally distributed, with mean 90 minutes and standard deviation 35 minutes. a) what is the

which of the following is a correct interpretation of a 90% confidence interval? a. 90% of the random samples you could select would result in intervals that c

Jasmine was helping her father mow the lawn. She knew that their front lawn was a square with an area of 64 m 2 . She liked to cut the grass by pushing the lawn

the fluid ounces in syrup bottles is normally distributed with a mean of 18 oz. and a standard deviation of 1 oz. what is the minimum number of ounces a bottle

At the pool, Janae jumps off a diving board that is 15 feet high. Janaes height above the water is modeled by the function f(x)=-5x^2+10x+15. 1.Janae made a

the number of hours spent per week on household chores by all adults has a mean of 26.3 hours and a standard deviation of 7.4 hours. the probability, rounded to

the u.s. energy information administration (us eia) reported that the average price for a gallon of regular gasoline is $2.94. the us eia updates its estimates