ECO452



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the square root of the population variance is known asâ€|
Answer: standard deviation of population

‭	‬expresses the relationships that exist
between a population and the sample drawn from such population.
Answer: sample theory

calculate the mean of 4, 6, 8,10,15
Answer: 14.3

... can be defined as a statistical tool for drawing a sample from a total population
Answer: sampling

The standard deviation from a binomial distribution of n = 20 and p = 0.04 is
Answer: 2.83

In ANOVA, state the degree of freedom within group
Answer: (r-1 )k

The total variation in two-way ANOVA is divided intoâ€|â€|â€!
Answer: variation between treatment, variation between block and residual variation

Component of time series in all but
Answer: panel regression

In a binomial distribution problem, if n=50 and p=0.05, what is the mean value of U
Answer: 2.5

In sampling distribution, if the probability of success is presented as P =0.4, what is the probability of failure
Answer: 0.6

R-square in multiple correlation is calledâ€|. Answer: coefficient of determination

State the null hypothesis as used in ANOVA
Answer: hO: u1= u2 = u3 =â€|.=un

A probability distribution whose statistic is obtained through a large number of samples drawn from a specific population is calledâ€|
Answer: sample distribution

â€|â€|â€|. is defined as the average value in a sample.
Answer: sample mean

Partial correlation coefficient between Y and X1, holding X2 constant can be presented as
Answer: ryx1 x2

What does partial correlation measures?
Answer: measures the correlation between a dependent variable and one independent variable holding other variables constant

In testing overall significance of a multiple regression model, if n=8, k=3, find the degree of freedom and the value of Ftab at 5% level of significance
Answer: df= 2,5 and ftab = 5.79

â€| the decision rule of F-Statistic test
Answer: if fc > 0, we accept the null hypothesis otherwise we reject the null and accept the alternative

In statistics, stating level of confidence as 95% confidence level means â€|â€|..
Answer: it is about stating a probability that the estimate is right at 95%







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