Author Question: A null hypothesis is that the probability is 0.7 that a new drug will provide relief in a randomly ... (Read 148 times)

TVarnum

  • Hero Member
  • *****
  • Posts: 548
A null hypothesis is that the probability is 0.7 that a new drug will provide relief in a randomly selected patient. The alternative is that the probability of relief is greater than 0.7 . Suppose the treatment is used on 500 patients and there are 380 successes. How would a p-value be calculated in this situation?
 a. Find the chance of 380 or more successes, calculated assuming the true success rate is greater than 0.7.
  b. Find the chance of 380 or more successes, calculated assuming the true success rate is 0.7.
  c. Find the chance of fewer than 380 successes, calculated assuming the true success rate is greater than 0.7.
  d. Find the chance of fewer than 380 successes, calculated assuming true success rate is 0.7.

Question 2

Grade school students, especially the ones in higher grades, tend to spend a lot of time on the computer already. The average amount of time 4th grade boys spend on the computer is 5 hours per week, with a standard deviation of 1 hour. For 5th grade boys the average increases to 7 hours per week with a standard deviation of 1.5 hours. Random sample of 20 4th grade students and 25 5th grade students are to be selected. What is the probability that the difference between the sample means is greater than 1 hour?



jennafosdick

  • Sr. Member
  • ****
  • Posts: 345
Answer to Question 1

B

Answer to Question 2

0.9962

this gasoline tank claims that the actual capacity of a randomly selected tank has a distribution that is approximately normal with a mean of 15.0 gallons. A random sample of 25 tanks results in an average of 14.8 gallons with a standard deviation of 0.42 gallons.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

Did you know?

It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

For a complete list of videos, visit our video library