This topic contains a solution. Click here to go to the answer

Author Question: If x is a binomial random variable, calculate 2 for n = 40 and p = 0.3 . A) 3.6 B) 12 C) 8.4 D) ... (Read 69 times)

bobthebuilder

  • Hero Member
  • *****
  • Posts: 567
If x is a binomial random variable, calculate 2 for n = 40 and p = 0.3 .
 
  A) 3.6 B) 12 C) 8.4 D) 2.898

Question 2

A local newspaper claims that 70 of the items advertised in its classifieds section are
  sold within 1 week of the first appearance of the ad.
 
  To check the validity of the claim,
  the newspaper randomly selected n = 25 advertisements from last year's classifieds and
  contacted the people who placed the ads. They found that 16 of the 25 items sold within
  a week. Based on the newspaper's claim, is it likely to observe x  16 who sold their item
  within a week? Use a binomial probability table.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

daiying98

  • Sr. Member
  • ****
  • Posts: 354
Answer to Question 1

C

Answer to Question 2

Let x = the number of the 25 ads that resulted in the item being sold within a week.
Then X is a binomial random variable with n = 25 and p = 0.70.
P(x




bobthebuilder

  • Member
  • Posts: 567
Reply 2 on: Jun 24, 2018
Gracias!


chereeb

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

For a complete list of videos, visit our video library