Statıstıcs II (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
Which of the following is not one of the assumptions in a linear regression model?
- 2
Total price for products group A is 27 and 24 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?
- 3
In decision making, _____________ are the outcomes on which the decision maker has little or no control.
- 4
Which of the followings looks at the relationship between variables and examines the degree of the relationship if there is any?
- 5
Which test is used to decide whether k independent samples are drawn from different populations?
- 6
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?
- 7
What might be the correlation coefficient according to that graph?
- 8
Total price and quantity for products group A is 4 and 15, and 5 and 4, as unit a and unit b, for months X and Y, respectively. What is the Laspeyres' price index for A for month X when month Y is the base?
- 9
The payoff values for decision alternatives : there are 5 states of nature and minimum payoff values for 5 decision alternatives are I) 1.150, II) 1.025, III) 1.275, IV) 1.725, V) 1.450. The decision maker is pessimistic. Which decision alternative is choosen?
- 10
Which of the following is not true about the multiple linear regression model
? - 11
Decision maker defines the coefficient of optimism as 0.34 , then what is the coefficient of pessimism?
- 12
A decision alternative has 80 and 30 as payoff values and the probabilities of the associated states of nature are 0.60 and 0.40 respectively. What is the expected monetary value of this decision alternative?
- 13
Answer the following three questions (Q5,Q6 and Q7) according to those information.
The following table contains the exam scores of three different classes.
A mathematics teacher wants to test whether the distribution of exam scores for all classes are identical or not. Which test should be used for that hypothesis testing? (Confidence level= 0.95)
- 14
Interval estimation : the limits of the confidence interval are (99, 123), the significance level is 0.01. What is the sample arithmetic mean?
- 15
In a two population hypothesis testing problem, the sample arithmetic means are 45 and 80. If the z value is calculated, what is the value of numerator for z?
- 16
what is the last step of hypothesis testing?
- 17
Interval estimation : the sample arithmetic mean is 87 and the lower limit of the confidence interval is 78, then what is the upper limit of the confidence interval?
- 18
What is the third step of hypothesis testing?
- 19
Sample values for a continuous variable (electric voltage at home ; as volt) : 204, 214, 226, 234, and 242. What is the point estimate of the population arithmetic mean?
- 20
What is the indicator of the precision for an estimation of a population parameter with a given sample size and alpha?