• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/14

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

14 Cards in this Set

  • Front
  • Back
What is Hypothesis ?
Is a part od statical interferece. Judgementg of Popolation parameter based on sample data.
how many tests are possible ?
1. Single Mean
2. Difference between means 3. Mean differences
4. Single Variance
5. Equality / Inequality of two variances
6. Correlation test (Correlation coefficient)
Formula for Test Stastic ?
Test Stastic = (X(mean) - mue(0)) / (smallsigma/n^0.5)
Type 1 and Type 2 Errors ?
Type 1 Error - alpha Error ,when Null Hypothese is true but its been rejected.
Type 2 Error - Beta Error, when Null Hypothesis false but its not been rejected.
CLASS
In order to use an object within a program, we need to provide a definition for the object. This definition is called a class. The class describes how the object behaves, what kind of information it contains, and how to create objects of that type. A class can be thought of as a mold, template, or blueprint that the computer uses to create objects.
What is a P-Value ?
Minimum Siginiance Lavel (probability) at which a Null-Hypothesis can be rejected. Example .002718 % (page 253 in book)
T-test ?
with t-statistics example on Iphone
Test of the Difference of two Polulation means - in how many ways (which type of test )?
1. Normally distributed population with unknown variance but assumed equal (t-test)
2. Normally distributed population with unknown variance but assumed unequal (t_test)
Paired Comparision Test ?
Paired test is the Test for the difference in the mean for the dependendent Items. (Test for the difference of mean for dividend return for a compney before and after the change of tax policy when tax policy effect the dividend policy)
It is also a T-test.
What is a Chi-squere Test ?
A Variance test for a normally distributed population, Chi-squere test dones not have negative values and bounded with zero. (beim Anschu der statistic von tabelle , beacten Probability on the right tail)
Formula for Chi-squere Test Stastic ?
Ho : s = smallsigma(0), Ha : s <> smallsigma(0)
Test statistics :
Chi^2 = (n-1)*s^2/smallsigm(0)^2 (where smallsigma(0) --> hypothesis Value)
DF = n -1
Example for Alternative Hypotheis in case of less then or greter then test (picture from Iphone)
H(o) : smallsigma^2 >= 16, H(a) : smallsigma^2 < 16
What is a F-test ? (test statistic formula and degree of freedom)
Ho: s1 = s2 , Ha : s1 <> s2
Test for two variance equality test for s1^2/s2^2 =1
(take the highre ration in Zeller s1^2)
Degree of Freedon
df(1) =n(1)-1 and
df(2)=n(2)-1
What is significance level ?
Probability of making Type 1 Error - alpha Error (rejecting the null-hypothesis when is actually true)