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

Author Question: The standard deviation of a binomial distribution is _____. a. E(x) = pn(1 n) b. E(x) = np(1 p) ... (Read 40 times)

jc611

  • Hero Member
  • *****
  • Posts: 552
on: Jun 24, 2018
The standard deviation of a binomial distribution is _____.
 a. E(x) = pn(1  n)
  b. E(x) = np(1  p)
  c. E(x) = np
  d. None of the answers is correct.

Question 2

The average starting salary of students who graduated from colleges of Business in 2009 was 48,400 . A sample of 100 graduates of 2010 showed an average starting salary of 50,000 . Assume the standard deviation of the population is known to be 8000 . We want to determine whether or not there has been a significant increase in the starting salaries.
 a. State the null and alternative hypotheses to be tested.
  b. Compute the test statistic.
  c. The null hypothesis is to be tested at the 5 level of significance. Determine the critical value for this test.
  d. What do you conclude?
  e. Compute the p-value.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

vseab

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jun 24, 2018
Answer to Question 1

d

Answer to Question 2

a. H0:   48,400
Ha:  > 48,400
b. Test statistic z = 2.0
c. Critical z = 1.645
d. Reject H0 and conclude that there has been a significant increase in the starting salaries.
e. p-value = .0228


jc611

  • Member
  • Posts: 552
Reply 2 on: Jun 24, 2018
Excellent

matt95

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

Green tea is able to stop the scent of garlic or onion from causing bad breath.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Distribution of glaciers in North America (a) in the late twentieth century, and (b) 18,000 years ag Distribution of glaciers in North America (a) in the late twentieth century, and (b) 18,000 years ag
Distribution of TBW Distribution of TBW
Standard Precautions for the Care of all Patients in All Health Care Settings Standard Precautions for the Care of all Patients in All Health Care Settings
Distribution of dystrophin in muscle cells. (a) In normal muscle cells, all the dystrophin is locate Distribution of dystrophin in muscle cells. (a) In normal muscle cells, all the dystrophin is locate
Binomial Formulas Binomial Formulas
Distribution of Fluids in a Human Body Distribution of Fluids in a Human Body
Video: Normal and abnormal blood pH

For a complete list of videos, visit our video library