1. If a variable is continuous, it can assume an infinite number of values within a given:

—>> interval

Value

Probability

Line

2. The total area under the curve of a probability distribution, being the sum of individual probabilities is equal to

2

3

—>> 1

4

3. What distribution is usually used to predict occurrence of events that are mutually exclusive?

Contnuous distribution

Nominal distribtuion

—>> Binomial distribution

Interval distribution

4. A variable which is one that can assume only finite and distinct value is called

Interval random

—>> Discrete random

Continous

Independent variable

5. The normal curve is:

V-shaped

—>> Bell-shaped

Curved shape

K-shaped

6. What is the probability of obtaining 3 heads in 5 toss of a balanced coin?

—>> 0.3125

0.52

0.55

0.499

7. The model that attempts to expose the relative and combine effect of the independent variable on the dependent variable is called

Simple regression

—>> Multiple regression

Correlation

T-value

8. What is usually used in determining the probability of a designated number of successes per unit of time?

Normal distribution

Nominal distribtuion

Passion distribution

—>> Poisson distribution

9. An important feature of probability distribution is that the areas under these curve represents:

Variables

Statistic

Data

—>> Probabilities

10. What is a continuous probability distribution and the most commonly used distribution in statistical analysis:?

Abnormal distribution

Curved distribution

—>> Normal distribution

K-class

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Question: If the prob(head) = Â14 = p, then Prob(not obtaining a head) will be
Answer: q = 1 – p

Question: Given ΣX = 800, ΣY = 811, ΣXY =54107, ΣX2 = 53418, ΣY2 = 54849, n =12, what will be the least square equation of Y on X?
Answer: E2 = 35.80 + 0.48X

Question: Which of the following defines Fisherâ€s Ideal Price Index?
Answer: ΣPnQo/ΣPoQo x100

Question: Three variable linear regression model is usually written as
Answer: Y = bo + b1X1 + b2X2 + |1/4

Question: The assumptions of analysis of covariance include among others except
Answer: The values in the population are normally distributed

Question: Index number can be calculated by any of the following methods except
Answer: Least squares method

Question: Multiple regression model attempts to expose the relative and combine importance ofâ€|.
Answer: independent variables on dependent variables

Question: Binomial distribution symbolically it is written as;
Answer: P(x) = nCx Pxqn-x

Question: Al! are the descriptive Population parameter except
Answer: xl…

Question: In technical language, a set of data is regarded as a sample drawn from
Answer: larger universe

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

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

Component of time series in all but
Answer: panel regression

Poisson distribution is used to
Answer: determine the probability of designated number of success

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

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

measures how a variable dispersed around the population mean
Answer: standard deviation of population

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

If the variance of a population is denoted as Var P and n = 100, P = 0.4, what is the standard error?
Answer: 0.04

Standard error is â€|.
Answer: defined as the square root of population variance

x1 and x2 are the means of two samples drawn from population. Specify the sampling distribution of the differenc of two means.
Answer: (x1 – x2) = up1 – up2

In a sampling distribution of two means, if P1 = (20,40) and P2 = (30,60), what is Up1 +
p2?
Answer: 77.5

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

Is the assumption \
Answer: yes

the formular for calculating intercept multiple regression
Answer: y = a – bx1 – bx2

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

The total variation in two-way ANOVA is divided into
Answer: variation between treatment, variation between block and residual variation

is a continous variable that correlate with the dependent variable
Answer: covariate

In a two way ANOVA, set of observation is classified as
Answer: 2 factor

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