Statıstıcs II (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
Which of the followings is widely used in order to show the degree of the relationship between two continuous variables?
- 2
The payoff values for decision alternatives : there are 5 states of nature and the profit values for the first decision alternative are 6, 7, 4, 9, 8. The decision maker is pessimistic. Which payoff value is taken from the first decision alternative?
- 3
In Wilcoxon Rank Sum Test n1=45 and n2=40 then what is the value of E[S]?
- 4
In Wilcoxon Signed Rank Test if n=25 then what is the value of E[S]?
- 5
Which of the followings represents random error in simple linear regression model?
- 6
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"?
- 7
Which of the followings looks at the relationship between variables and examines the degree of the relationship if there is any?
- 8
Which of the following is non-parametric statistics for two dependent samples?
- 9
A decision alternative has 2 and 4 as payoff values and the probabilities of the associated states of nature are 0.25 and 0.75 respectively. What is the expected monetary value of this decision alternative?
- 10
In which of the following decision making environment, the decision maker is able to assign probabilities to states of nature?
- 11
The payoff values for decision alternatives : there are 6 states of nature and the profit values for the first decision alternative are 690, 780, 540, 410, 710, 320. The decision maker is optimistic. Which payoff value is taken from the first decision alternative?
- 12
The payoff values for decision alternatives : there are 6 states of nature and the cost value for the first decision alternative is 20 according to optimist and 30 according to pessimist. If coefficient of optimism is 0.3, what is payoff value for the first decision alternative?
- 13
In a binomial test, if the P is 0.40, what is the value of Q?
- 14
In Eskisehir, 10 students were selected randomly from each of 3 universities to participate in a survey. Which type of sampling method was used?
- 15
The price of a certain electronic product at a chain store is 180 TL. The same electronic product is also available through various online stores and five of the store prices are as follows: 155, 179, 175, 175, 161 TL. Let’s assume that online prices are normally distributed and at the significance level α = 0.1.
Given the information above, what can we conclude about the mean online store price of the product?
- 16
If someone wants to carry out a research to find out the smoking rate in females over the age of 50 living in Eskişehir, what is the target population for this research?
- 17
There are 28 red apples, 24 green apples, 16 immature apples, 32 red tomatoes, 16 green tomatoes, and 20 immatue tomatoes in a box. What is the population proportion estimate of immature things in this box ?
- 18
Which of the following is NOT a statistical hypothesis?
- 19
what do we call "P(fail to reject the null hypothesis H0 when it is actually false)"?
- 20
(Answer the questions 9 and 10 according to following information)
A sales manager assesses that %60 of their costumers are happy with their product. A sample of 150 customers were selected randomly and it was found that 80 of them are happy with the product. Test the sales manager assessment at %95 confidence level.
What is the test statistic at this hypothesis testing?