# ECO254 NOUN TMA Past Questions & Answers

#### La2ush

##### Moderator
1. Question: In the case of one explanatory variable in a regression model it is called
Answer: simple linear regression

2.Question: For more than one explanatory variable it is called a
Answer: multiple regression

3.Question: In a linear regression are modeled using linear prediction functions
Answer: data

4. Question: could also be a model in which the median or some other quantile of the conditional distribution of y is given x is expressed as a linear function of x
Answer: Linear regression

5. Question: focuses on the conditional probability distribution
Answer: Linear regression

6. Question: was the first type of regression analysis to be studied vigorously and to be used extensively in practical applications
Answer: Linear regression

7. Question: Can be used to fit a predictive model to an observed data
Answer: Linear regression

8.Question: The term regression was introduced by
Answer: Francis Galton

9.Question: Regression analysis is a statistical process for the relationship among variables
Answer: estimating

10.Question: Regression analysis helps one understand how the typical value of the variable changes when any one independent variable is varied while the other independent variables are fixed
Answer: dependent

#### La2ush

##### Moderator
11. Question: The test of goodness of fit analyze whether or not the observed distribution is different from the theoretical distribution
Answer: frequency

12. Question: The test of independence analyze whether the paired observations on two variables expressed in a contingency table are of one another
Answer: independent

13. Question: The formula for the Distribution is given as Et In
Answer: discrete Uniform

14. Question: The are not based on the number of observation as with a students t-test
Answer: degree of freedom

15. Question: The numbers of you rolled the die does not determine the degree of freedom
Answer: times

16. Question: Yates chi-square test is used when testing for independence in a
Answer: contingency table

17. Question: Cochran Mantel Statistics are collections of test statistics that is used for the analysis of stratified categorical
Answer: data

18. Question: Cochran Mantel Statistics shows the comparison of two groups on a different categorical
Answer: response

19. Question: Chi-square goodness of fit test is used to determine whether sample are consistent with a hypothesized distribution
Answer: data

20 Question: Every hypothesis test requires the analyst to state a null and an alternative
Answer: hypotheses

#### La2ush

##### Moderator
21. Question: The are stated in such a way that they are mutually exclusive
Answer: hypotheses

22. Question: The null hypothesis specifies the proportion of observations at each level of the categorical
Answer: variable

23. Question: The analysis plan describes how to use to accept or reject the null hypothesis
Answer: sample data

24. Question: The significance level in testing a hypothesis is either 95 or
Answer:099

25. Question: The test method use the chi-square goodness of fit test to determine whether observed sample frequencies differ significantly from expected frequencies specified in the
Answer: a null hypothesis

26. Question: Degree of freedom equal to the number of levels k of the categorical variable minus
Answer:1

27.Question: Expected frequency counts are equal to the sample times the hypothesized proportion from the null hypothesis
Answer: size

28.Question: An can be defined as any statistical test in which the test statistic has an F distribution under a null hypothesis situation
Answer: F test