Final Sınavı - Statıstıcs Iı

Soru 1:

If there is no correlation between two continuous variables, What is the value of Pearson's Correlation coefficient?

A) -1 B) -0.5 C) 0 D) 0.5 E) 1

Soru 2:

The payoff values for decision alternatives : there are 5 states of nature and the cost value for the first decision alternative is 12 according to optimist and 15 according to pessimist. If coefficient of optimism is 0.2, what is payoff value for the first decision alternative?

A) 13.50 B) 13.80 C) 14.10 D) 14.25 E) 14.40

Soru 3:

Answer the questions 1-4 according to the following situation. The weather can be either snowy, rainy or sunny tomorrow morning. Ahmet can go to work either by bus or by his own car. If the weather is sunny and he goes to work by his own car, it will take 10 minutes and if he chooses to go by bus it will take 20 minutes. On the other hand if the weather is rainy his own car will take 15 minutes and the bus will take 25 minutes to go to work. Finally, if the weather is snowy car option takes 20 minutes and bus option takes 35 minutes. The duration (time) of going to work is an example of ........

A) State of nature B) Nature of state C) Payoff D) Decision alternative E) Payroll

Soru 4:

Total price for products group A is 20 and 18 units for weeks X and Y, respectively. What is the fixed based simple average price index for A for week X when week Y is the base?

A) 90 B) 100 / 9 C) 100 / 19 D) 19 E) 25

Soru 5:

In decision making, _____________ are the outcomes on which the decision maker has little or no control.

A) probability B) data C) payoff matrix D) states of nature E) payoff

Soru 6:

When a probability of obtaining an outcome, out of two outcomes, on one trial is known and a probability of the number of times the same outcome might appear, say x times out of n independent trials is tried to be found, which probability distribution is used?

A) Normal B) t C) z D) F E) Binomial

Soru 7:

Which of the following hypotheses does NOT belong to Wilcoxon Rank Sum Test?

A) The two populations are identical. B) The first population is shifted to the right of the second population. C) The first population is shifted to the left of the second population. D) The first and the second populations are shifted from each other E) The population distribution is Uniform.

Soru 8:

In an investigation, Pearson’s correlation coefficient is found as 0.597. What is the type of correlation in this investigation?

A) Negative strong correlation B) Positive strong correlation C) Negative moderate correlation D) Positive moderate correlation E) No correlation

Soru 9:

Pearson’s correlation coefficient is found -0.48 in a problem. What is the coefficient of determination?

A) 0,23 B) -0,52 C) 0,77 D) 0,52 E) 0,48

Soru 10:

What is the simple index number for Nisan?

A) 2.80 B) 2.40 C) 1.89 D) 3.45 E) 9.6

Soru 11:

If there is no correlation between two continuous variables, what is the value of the Pearson's correlation coefficient?

A) -1 B) -0.5 C) 0 D) 0.5 E) 1

Soru 12:

Decision maker defines the coefficient of optimism as 0.2 , then what is the coefficient of pessimism?

A) 0.04 B) 0.10 C) 0.20 D) 0.40 E) 0.80

Soru 13:

The table shows s the times (in minutes) spent by five students revising for a test and the grades that they achieved in the test. What is Spearman’s rank correlation coefficient?

A) 1 B) 0.1 C) 0.2 D) 0.3 E) 0.5

Soru 14:

________________ tests are used to determine whether a data set comes from a particular distribution?

A) t-test B) z-test C) Goodness of fit tests D) ANOVA E) Regression

Soru 15:

If the value of Pearson's correlation coefficient is 0.85, what do we say about the linear relationship between these two variables?

A) Perfect correlation B) Very strong correlation C) Strong correlation D) Moderate correlation E) Weak correlation

Soru 16:

Total price and quantity for products group A is 4 and 33, and 5 and 40, as unit a and unit b, for years X and Y, respectively. What is the Fisher’s price index for A for year X when year Y is the base?

A) 200.0 B) 132.0 C) 66.0 D) 33.0 E) 16.5

Soru 17:

Which of the following hypotheses can be written in the significance test for Pearson’s correlation coefficient?

A) There is a correlation. Population correlation is zero. B) There is no correlation. Population correlation is not zero. C) There is a correlation. Population correlation is 1. D) There is no correlation. Population correlation is 1. E) There is no correlation. Population correlation is zero.

Soru 18:

Pearson’s correlation coefficient gets values between ____________ ?

A) -2, 9 B) -5, 6 C) 0, 1 D) -1, 1 E) -1, 0

Soru 19:

In a binomial test, the investigaor is interested in the proportion of boys in a school. In the sample of 250 students, there are 175 boys. What is the value of P for a binomial test for boys?

A) 0.40 B) 0.50 C) 0.60 D) 0.70 E) 0.80

Soru 20:

The payoff values for decision alternatives : there are 5 states of nature and the cost values for the first decision alternative are 96, 87, 45, 60, 78. The decision maker is optimistic. Which payoff value is taken from the first decision alternative?

A) 96 B) 87 C) 78 D) 60 E) 45