Cash-back offer from March 22nd to 31st, 2024: Get a flat 10% cash-back credited to your account for a minimum transaction of $50.Post Your Questions Today!

Question Details Normal
$ 35.00

Stats 200 Quiz #2

  • From Mathematics, Statistics
  • Due on 20 Feb, 2015 09:20:00
  • Asked On 19 Feb, 2015 02:22:38
  • Due date has already passed, but you can still post solutions.
Question posted by
Online Tutor Profile
request

Quiz 2

Each question is worth 1 point.

Don’t leave anything blank. I can always find a way to give you some credit if you’ve made an attempt. Be sure to post any questions you have after the answers open.

The work you turn in by 11:59 P.M. on Feb 22nd must be your own.

 

1.      You draw two cards from a deck, what is the probability that:

 

a.       both of them are face cards (king, queen, or jack)?

 

 

 

 

b.      you draw two cards from a deck and both of them are hearts?

 

 

 

 

 

 

2.      Assume adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15.

 

a.       Find the probability that a randomly selected adult has IQ < 115

 

 

 

 

 

b.      Find the probability that a randomly selected adult has IQ > 70

 

 

 

 

 

c.       Find P30, which is the IQ separating the bottom 30% from the top 70%

 

 

 

 


 

3.      a.  When would the mean grade in a class on a final exam be considered a statistic?

 

 

 

b.  When would it be considered a parameter?

 

 

 

c..  Define bias in terms of expected value.

 

 

b.       Is it possible for a statistic to be unbiased yet very imprecise? Can it be accurate but biased?

 

 

 

      4. a.  Why is a 99% confidence interval wider than a 95% confidence interval?

 

 

          b.  When you construct a 95% confidence interval, what are you 95% confident about?

 

 

5.      My parents lived in Florida and wanted to know the probability of winning the Florida

Fantasy 5 if they bought one ticket. They had to pick the five winning numbers from 1-

36. Each randomly selected number is different and order doesn’t matter. What is the

Probability of their winning?

 

 

 


 

6.       In a study of families with children with disabilities, group of 6 US households were

randomly selected. In the table below, the random variable x represents the number of

households among 6 that had a child with a disability living there.

 

 

x

P(x)

0

0.539

1

0.351

2

0.095

3

0.014

4

0.001

5

0+

6

0+

 

 

 

 

 

 

 

 

a)      Is this a probability distribution?

 

 

b)      What is the mean?

 

 

 

 

 

 

c)      What is the standard deviation?

 

 

 

 

 


 

 

7.      Ten peas are generated from parents having the green/yellow pair of genes so there is a

75% probability that an individual pea will have a green pod. Find the probability that

among the 10 offspring peas, at least 9 have green pods. Is this unusual? Explain.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8.  Find the critical value:

 

a. Z0.02

 

 

b. Z0.01

 

 

c. Z0.10

 

 


 

 

 

Available Answers
Other Related Questions
User Profile
panca...

The benefits of buying study notes from CourseMerits

Assurance Of Timely Delivery
We value your patience, and to ensure you always receive your homework help within the promised time, our dedicated team of tutors begins their work as soon as the request arrives.
Best Price In The Market
All the services that are available on our page cost only a nominal amount of money. In fact, the prices are lower than the industry standards. You can always expect value for money from us.
Uninterrupted 24/7 Support
Our customer support wing remains online 24x7 to provide you seamless assistance. Also, when you post a query or a request here, you can expect an immediate response from our side.
closebutton
Only 45 characters allowed.
closebutton

$ 629.35