This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Past data indicates an 80 (0.8) success rate in treating a certain medical problem. A new treatment ... (Read 190 times)

Chelseaamend

  • Hero Member
  • *****
  • Posts: 545
on: Jul 24, 2018
Past data indicates an 80 (0.8) success rate in treating a certain medical problem. A new treatment is used on 100 patients in a clinical trial. It is successful in 87 (0.87) of the cases. What is the value of the z-score that can be used to test the null hypothesis that the success rate is 80?
 a. 7
  b. 2
  c. 1.75
  d. -1.75

Question 2

College students spend a lot of their money, not on things they would like to buy, but on text books. College text books have increased in price significantly over the past few years. The amount students spend on text books is approximately normally distributed with a standard deviation of 50 . The average amount spent on books each semester is 340 for undergraduate students and 250 for graduate students. Independent random samples of 100 undergraduate students and 80 graduate students are to be selected and the average amount they spent on text books last semester is to be compared (undergraduate  graduate). What is the probability that the difference between the sample means is greater than 100?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

irishcancer18

  • Sr. Member
  • ****
  • Posts: 310
Reply #1 on: Jul 24, 2018
Answer to Question 1

C

Answer to Question 2

0.0912


Chelseaamend

  • Member
  • Posts: 545
Reply 2 on: Jul 24, 2018
:D TYSM

steff9894

  • Member
  • Posts: 337
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Fossils Give Us a View of Past Life Fossils Give Us a View of Past Life
Black and white patients enrolled in Medicare do not receive the same medical treatment, even when ... Black and white patients enrolled in Medicare do not receive the same medical treatment, even when ...
How to solve a trigonometric problem involving two right triangles (Question 1) How to solve a trigonometric problem involving two right triangles (Question 1)
Early geologists discovered evidence of past glaciations in U-shaped valleys Early geologists discovered evidence of past glaciations in U-shaped valleys
For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ... For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ...
Compute the rate of discount allowed on a rontor -tiller that lists for K 341 and is sold for K ... Compute the rate of discount allowed on a rontor -tiller that lists for K 341 and is sold for K ...
Video: Wound Repair Animation

For a complete list of videos, visit our video library