Refer to the above problem. Suppose you randomly survey 11 California residents. We are interested in the number who have adequate earthquake supplies.
What is the probability that at least 8 have adequate earthquake supplies?
Is it more likely that none or that all of the residents surveyed will have adequate earthquake supplies? Why?
How many residents do you expect will have adequate earthquake supplies?
0.0043
none
3.3
The next 2 questions refer to the following: In one of its Spring catalogs, L.L. Bean® advertised footwear on 29 of its 192 catalog pages.
Suppose we randomly survey 20 pages. We are interested in the number of pages that advertise footwear. Each page may be picked at most once.
How many pages do you expect to advertise footwear on them?
Is it probable that all 20 will advertise footwear on them? Why or why not?
What is the probability that less than 10 will advertise footwear on them?
Suppose we randomly survey 20 pages. We are interested in the number of pages that advertise footwear. This time, each page may be picked more than once.
How many pages do you expect to advertise footwear on them?
Is it probable that all 20 will advertise footwear on them? Why or why not?
What is the probability that less than 10 will advertise footwear on them?
Reminder: A page may be picked more than once. We are interested in the number of pages that we must randomly survey until we find one that has footwear advertised on it. Define the random variable X and give its distribution.
What is the probability that you only need to survey at most 3 pages in order to find one that advertises footwear on it?
How many pages do you expect to need to survey in order to find one that advertises footwear?
3.02
No
0.9997
0.3881
6.6207 pages
Suppose that you roll a fair die until each face has appeared at least once. It does not matter in what order the numbers appear. Find the expected number of rolls you must make until each face has appeared at least once.
Try these multiple choice problems.
For the next three problems : The probability that the San Jose Sharks will win any given game is 0.3694 based on a 13 year win history of 382 wins out of 1034 games played (as of a certain date). An upcoming monthly schedule contains 12 games.
Let
$X$ = the number of games won in that upcoming month.
The expected number of wins for that upcoming month is:
1.67
12
$\frac{382}{1043}$
4.43
D: 4.43
What is the probability that the San Jose Sharks win 6 games in that upcoming month?
0.1476
0.2336
0.7664
0.8903
A: 0.1476
What is the probability that the San Jose Sharks win at least 5 games in that upcoming month
0.3694
0.5266
0.4734
0.2305
C: 0.4734
For the next two questions : The average number of times per week that Mrs. Plum’s cats wake her up at night because they want to play is 10. We are interested in the number of times her cats wake her up each week.
In words, the random variable
$X$ =
The number of times Mrs. Plum’s cats wake her up each week
The number of times Mrs. Plum’s cats wake her up each hour
The number of times Mrs. Plum’s cats wake her up each night
The number of times Mrs. Plum’s cats wake her up
A: The number of times Mrs. Plum's cats wake her up each week
Questions & Answers
Is there any normative that regulates the use of silver nanoparticles?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
Source:
OpenStax, Collaborative statistics (custom lecture version modified by t. short). OpenStax CNX. Jul 15, 2013 Download for free at http://cnx.org/content/col11543/1.1
Google Play and the Google Play logo are trademarks of Google Inc.
Notification Switch
Would you like to follow the 'Collaborative statistics (custom lecture version modified by t. short)' conversation and receive update notifications?