Deneme Sınavı Soruları

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Cevap anahtarı açık: çöz, sonucunu gör

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1
Answer the questions 7-8 according to following information.

A company has 5 different alternative actions denoted by A1, A2,..A5 under 3 possible states of nature, which are denoted by S1, S2 and S3. The pay off matrix for each action and state of nature is given as:

What will be the best action under maximax criterion?
2

In which of the following decision making environment, the decision maker can list all the states of nature that are possible in the decision problem but cannot assign any probability value to the specific state of nature that might happen?
3
When the Laspeyres quantity index is calculated, the price is the weight in the ____ period.

Which of the following completes the sentence best?
4
Price of X is 10, and 8 units on January, and April, respectively. January is the base period. What is the fixed based simple price index for April?
5
In Wilcoxon Signed Rank Test if n=25 then what is the value of E[S]?
6
What is the interpretation of Pearson’s Correlation Coefficient values "0 < r < 0.2"?
7

In a simple linear regression model, if the equation is as follow,

y= 5 + (3.5)x

which of following is the mean of the value of "3.5"?
8
If the correlation between two variable is defined as very weak positive correlation, which one of the following correlation value is possible?
9
If the SSE in multiple regression model is 150, k=5, and n=50, then what is MSE?
10
If the correlation coefficient is 0.50 which one of the following is true?
11
Which of the following interpretations is true if the negative value is -1 and the positive value is+1 in the interpretation of Pearson’s Correlation Coefficient?
12

A multiple linear regreesion model is given above. Which one of the following statements is correct?
13
Monthly sales of companies X and Y are 45 units and 72 units, respectively. What is the index for X compared to Y?
14
For the means of two normal distributions, what is the null hypothesis for two sided (two tailed) test?
15
If there are 120 objects in a population and the investigator wants to use simple random sampling to choose objects in to a sample from this population, what is the probability of a object to be selected in to a sample?
16
For α = 0.24 significance level what is the acceptance area under the standard normal curve for two-sided tests?
17
What does the term '1-β' indicate?
18
What is the difference between stratified and cluster sampling?
19
I. If the alternative hypothesis is in the form of H₁: p1α

II. If the alternative hypothesis is in the form of H₁: p1>p2 then rejection region is z>z_α

II. If the alternative hypothesis is in the form of H₁: p1≠p2 then rejection region is z=z_α/2

For the given statements about the hypothesis test of the difference between two population proportions which ones can be said to be true?
20
Interval estimation : the limits of the confidence interval are (0.41, 0.97), the significance level is 0.01. What is the sample arithmetic mean?

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