Statıstıcs II (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
Which one of the following statements is true?
- 2
What is the expected monetary value of the decision alternative A3?
- 3
Which of the followings will show you all the possible decision alternatives of the problem, all the states of nature and the payoff values for each of alternative and states of nature combination as a manager in a company and want to invest/build a new factory?
- 4
In decision making, where do we show all the possible decision alternatives of the problem, all the states of nature and the payoff values for each of alternative and states of nature combination?
- 5
I. It is suitable to use when one of the two variables in the question is measured in ordinal scale.
II. Spearman’s Rank Correlation Coefficient is a nonparametric alternative to Pearson.
III. It can be used when association between the variables is not linear.
Which of the statement/s above is correct about Pearson correlation coefficient?
- 6
What is A in the graph above?
- 7
In general, the correlation analysis looks at the relationship between variables and examines the degree of the relationship if there is any. Which of following presents the reverse relationship between the values of the variables?
- 8
What does the value near 0 of Spearman’s rank correlation coefficient mean?
- 9
What is the value ranged of Spearman’s Rank Correlation Coefficient?
- 10
The payoff values for decision alternatives : there are 5 states of nature and the profit value for the first decision alternative is 15 according to optimist and 12 according to pessimist. If coefficient of optimism is 0.6, what is payoff value for the first decision alternative?
- 11
The payoff values for decision alternatives : there are 5 states of nature and the cost values for the first decision alternative are 69, 17, 54, 16, 34. The decision maker is optimistic. Which payoff value is taken from the first decision alternative?
- 12
Total price for products group A is 14 and 16 units for months X and Y, respectively. What is the simple aggregate price index for A for month X when month Y is the base?
- 13
In which of the following models the constant of simple linear regression α is represented by β0?
- 14
In hypothesis testing, which of the steps below is the first to be followed?
- 15
if you want to take a random sample from the population, what should be done for an accurate sample?
- 16
What is also called availability sampling method?
- 17
If a research team have a suspicion that sampling may lead to a bias, which sampling method is most likely the one used in the study?
- 18
Population can be finite or ___________ ?
- 19
For a statistical test following a normal distribution, the alternative hypothesis is that the mean equals to a thousand and the standard deviation is σ = 24. A sample of 576 observations is randomly selected and the sample average is equal to 1020. What is the test statistic equal to?
- 20
In a hypothesis testing procedure, the population mean and standard deviation are 800 and 200 respectively. On the other hand, sample arithmetic mean of a random sample of 225 observations is 950. If this procedure is followed, what is the value of the observed z?