Calculate probability, Mathematics

Assignment Help:

The following table contains some information about the model used. Assume the probabilities given by the model are those of being a good writer.

Variable

estimate

CI for exp(b)

constant

-16.71

 

Sex

0.46

(0.17,2.32)

level 1

0.88

(0.46,12.68)

level 2

0.16

(0.25,5.58)

Score

0.80

(1.40,3.53)

Suppose the 63 students come from a random sample of students in BC and a principal in a school wants to use this study to get information about good writers. The principal has a lot of questions regarding the probability of being a good writer for different values combinations of the explanatory variables. The questions below are some of those questions posed by the principal.

1. She wants to know the probability of being a good writer for a girl in 5th grade with a score of 18 and for a boy in 7th grade with a score of 12.

2. For boys in 5th grade, she wants to know what is the minimum score needed in order to have a probability greater than 0.5 of being a good writer? What is the minimum score needed in order to have a probability greater than 0.5 of being a good writer for girls on 4th grade?

3. How can you interpret the 95% CI for exp(b1) where b1 is the coefficient corresponding to the sex variable and what can you tell to the principal in terms of differences between girls and boys?

4. The principal tells you that she doesn't really understand about odds and odds ratios and requests that you give her instead a 95% CI for b1. Obtain this interval and mention what can you tell to the principal in terms of differences between girls and boys according to it.


Related Discussions:- Calculate probability

Geometry, how to do mathematical proofs

how to do mathematical proofs

Definite integral, Definite Integral : Given a function f ( x ) which is c...

Definite Integral : Given a function f ( x ) which is continuous on the interval [a,b] we divide the interval in n subintervals of equivalent width, Δx , and from each interval se

Reduction formulae, Reduction formulae Script for Introduction: ...

Reduction formulae Script for Introduction: First let us know what is meant by reduction formula. In simple words,                 A formula which expressess(or re

Solving multi step equations, can you help me? cause im in 7th grade advanc...

can you help me? cause im in 7th grade advanced math and tomorrow I have a test tomorrow and I don''t get this

Interpretations of the derivative , Interpretations of the Derivative : ...

Interpretations of the Derivative : Before moving on to the section where we study how to calculate derivatives by ignoring the limits we were evaluating in the earlier secti

Operation on polynomial, Perform the denoted operation for each of the foll...

Perform the denoted operation for each of the following.  (a) Add 6x 5 -10x 2 + x - 45 to 13x 2 - 9 x + 4 .   (b) Subtract 5x 3 - 9 x 2 + x - 3 from       x 2+ x +1.

Angles, how to measure missing angle of an adjacent angle

how to measure missing angle of an adjacent angle

Find the volume of the liquid , A vessel in shape of a inverted cone is sur...

A vessel in shape of a inverted cone is surmounted by a cylinder has a common radius of 7cm this was filled with liquid till it covered one third the height of the cylinder. If the

Definition of minimum and maximum values, Definition 1.   We say that f...

Definition 1.   We say that f(x) consist an absolute (or global) maximum at x = c if f ( x ) ≤ f (c ) for every x in the domain we are working on. 2.  We say that at x = c ,

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd