# ECO253 e-exam (2019)

Question MCQ1 : The two possible values of each in a Bernoulli process Xi are often called?

Question MCQ2 : The negative Binomial variables may be interpreted as what?

Question MCQ3 : The probability tossing a coin once and get a head is?

Question MCQ4 : The total probability for any event is?

Question MCQ5 : If a random variable X takes only integral values it can be called?

Question MCQ6 : The normal distribution was first discovered by English Mathematician____?

Question MCQ7 : The following are properties of normal distribution curve except

Question MCQ8 : A random variable X has normal Distribution, and it is referred to as ___

Question MCQ9 : Using normal tables, find the values of the following probabilities: P(-1.50 < z < 2.50)

Question MCQ10 : Given a normal distribution with mean of 230 and standard deviation of 20, what is the probability that an observation from this population is: Greater than 280

Question MCQ11 : We know that for a binomial variate with parameter and p is ____
Answer: E(X) = np and Var(X) = npq

Question MCQ12 : Poisson distribution was derived in what year?

Question MCQ13 : Poisson distribution may be obtained as a limiting case of which distribution?

Question MCQ14 : The mean number of misprints per page in a book is 1.2. What is the probability of finding on a particular page no misprints?

Question MCQ15 : A statistical hypothesis test is a method of making decisions using ___?
Answer: Data from a scientific study.

Question MCQ16 : The following are statistical test tools except

Question MCQ17 : One out of the following is assumption for F-test for equality of variances.
Answer: The samples are simple random samples

Question MCQ18 : Chi-square distribution test one among the following:

Question MCQ19 : ANOVA can be how many ways?

Question MCQ20 : Statistics that do not assume the data or population have any characteristic structure or parameters is called?

Question MCQ21 : In statistics, the term non-parametric statistics has at least how many different meanings?

Question MCQ22 : Price and supply of a commodity is example what correlation?

Question MCQ23 :  Rainfall and Farm yield is example what correlation?

Question MCQ24 : Tax rate and consumption demand is example what correlation?

Question MCQ25 : Karl Pearsonâ€˜s coefficient of correlation isâ€¦

Question MCQ26 : Spearmanâ€˜s Rank Correlation Coefficient, usually denoted by?

Question MCQ27 : A more accurate way of finding the line of best fit is through the use ofâ€¦

Question MCQ28 : A simple regression model comprise of how may variables?

Question MCQ29 : In simple regression model how many independent variable do we have?

Question MCQ30 : Y = a + bX + e.

Question MCQ31 : In probability theory central limit theorem states that given a certain conditions the mean of a sufficiently _________ of iterates.

Question MCQ32 : By the law of large numbers, the sample averages converge in probability and almost surely to the expected valueâ€¦

Question MCQ33 : Ten unbiased coins are tossed simultaneously. Find the probability of obtaining: Exactly six heads

Question MCQ34 : All these are types of Index Numbers except

Question MCQ35 : Below are not problems in the construction of Index Numbers except

Question MCQ36 : Below ate methods of constructing index numbers except

Question MCQ37 : One of these is not a weighted Aggregate method

Question MCQ38 : Below are Uses of Index Number except
Answer: Use to measure sick people

Question MCQ39 : Data can be classified into two major sources from which they are obtained

Question MCQ40 : The following are disadvantages of primary data except

Question MCQ41 : The following are advantages secondary data except

Question MCQ42 : Data are also classified based on the form except

Question MCQ43 : _________ combine the features of cross-sectional and time-series data.

Question MCQ44 : The Sources of Secondary data are as follows except

Question MCQ45 : Below are some publications in Nigeria except

Question MCQ46 : Researchers collect data in order to test _______ and to provide empirical support for explanations and predictions.

Question MCQ47 : Sub-set of population is called?

Question MCQ48 : A particular value of the population, such as the mean income or the level of formal education, is called

Question MCQ49 : Below are the functions of money except

Question MCQ50 : To accurately estimate unknown parameters from known statistics, researchers have to effectively deal with one of these problems:
Answer: The size of the sample

Question FBQ1 : A _______ random variable is the simplest random variable.

Question FBQ2 : A Bernoulli process is a _____ or infinite sequence of binary random variable

Question FBQ3 : Several random variables and probability distributions beside the__________ itself may be derived from the Bernoulli process

Question FBQ4 : The negative Binomial variables may be interpreted as _________ waiting times

Question FBQ5 : A Bernoulli random variable is one which has only _________ and 1 as possible values.

Question FBQ6 : A Bernoulli random variable is the simplest random variable. It models an experiment in which there are only two outcomes. Generically, we say that X=1 is a success and X=0 is a failure. We say that p is the _______â€– probability.

Question FBQ7 : ______ the probability of success is constant for each trial. Then = 1-p, is the probability of failure in any trial.

Question FBQ8 : P(r) = P( X = ______ )

Question FBQ9 :

Since these probabilities are the successive terms in the Binomial expansion (q + p)n, it is called the ________ distribution

Question FBQ10 : Total probability is _____

Question FBQ11 : The normal distribution with is referred to as the standard ______ distribution.

Question FBQ12 : If X has a normal distribution with the ______ of Î¼ and the deviation  , then is the standard normal distribution,

Question FBQ13 : Poisson distribution may be obtained as a limiting case of ___________probability distribution under the following conditions

Question FBQ14 : The critical region of a hypothesis test is the set of all outcomes which cause the null hypothesis to be rejected in favour of the _________ hypothesis.

Question FBQ15 : Statistical hypothesis testing is sometimes called _______data analysis

Question FBQ16 : Common test Statistics are; t-test, z-test, chi-square test and f-test which is sometimes referred to as analysis of ___________ test

Question FBQ17 : t-test for the significance of single mean, population variance being unknown. True or False? _____

Question FBQ18 : One of the assumptions for Studentâ€™s test: The parent population from which the sample is drawn is not normal. True or False _________

Question FBQ19 : The sampling distribution of F-statistics does not involve any population parameters and depends only on the degrees of freedom n1 and n2. True or False _____.

Question FBQ20 : of _________ of fit and is used to test if the deviation between observation

Question FBQ21 : Under the null hypothesis that there is no significant difference between the observed and the _________ values.

Question FBQ22 : Karl _________ proved that the statisticâ€¦

Question FBQ23 : In statistics, the term non-parametric statistics refers to statistics that do not assume the data or population have any characteristic structure or_______________.

Question FBQ24 : Non-parametric models differ from parametric models in that the model structure is not specified a ______________ but is instead determined from data.

Question FBQ25 : The most frequently used tests include Kruskal- ________ one-way analysis of variance by ranks

Question FBQ26 : Spearman’s _______ correlation coefficient: measures statistical dependence between two variables using a monotonic function

Question FBQ27 : _______ signed-rank test: tests whether matched pair samples are drawn from populations with different mean ranks

Question FBQ28 : Suppose we are interested in testing Ho: P(+) = P (-) H1: P(+) â‰  _____Â

Question FBQ29 : Correlation provides an estimate of the relationship between _____ measurements, without any assumption of whether one comes before the other.

Question FBQ30 : Correlation coefficients have a value between _____ and +1.

Question FBQ31 : The correlation measures only the ________ of linear association between two variables while regression analysis is a statistical process for estimating the relationships among variables.

Question FBQ32 : Correlation is said to be positive when the values of two variables deviate in the opposite direction. True or False _______

Question FBQ33 : Correlation is said to be negative when the values of two variables deviate in the same direction. True or False _______

Question FBQ34 : Mutual dependence is the situation when the phenomena under study inter-influence each other. True OR False ____?

Question FBQ35 : Given two variables X and Y: If r = +1, there is a perfect direct relationship between Y and X. If r = -1, there is a perfect inverse or negative relationship between Y and X. If r = _________ there is no relationship between Y and X.

Question FBQ36 : One of the assumptions order to use the Pearson product-moment correlation: The measures are approximately normally distributed True or False _____?

Question FBQ37 : In regression analysis there are _____________ types of variable

Question FBQ38 : Typical regression model is specified in form of Y = a + b__ + e.

Question FBQ39 : Independent Variable is the variable which influences the value of the __________variable or which is used for prediction.

Question FBQ40 : A more accurate way of finding the line of best fit is the least square method. True OR False ____?

Question FBQ41 : Central limit theorem states that given a sufficiently large sample size from a population with a finite level of variance, the mean of all samples from the same population will be approximately equal to the mean of the population. True OR False ____?

Question FBQ42 : Let us suppose that Y1, Y2, Yn,…, are independent and identically distributed with ______ and finite variance Ïƒ2.

Question FBQ43 : The CLT can tell us about the distribution of large sums of random variables even if the distribution of the random variables is almost _________.

Question FBQ44 : The central limit theorem applies in particular to sums of independent and __________distributed discrete random variables.

Question FBQ45 : A random orthogonal matrix is said to be distributed uniformly, if its distribution is the not normalized Haar measure on the orthogonal group O(n, R). True or False ________?

Question FBQ46 : A linear function of a matrix is a linear combination of its elements (with given coefficients), is the matrix of the coefficients. True or False ________?