Statıstıcs II (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
Which of the followings looks at the relationship between variables and examines the degree of the relationship if there is any?
- 2
Which of the followings is the first step in decision making process?
- 3
In a binomial test problem, n = 6 and x = 2, what is the value of
in this problem? - 4
X is 51, Y is 170. What is the simple index number of X compared to Y?
- 5
What is constructed from changes in a number of different items and reflects the average change in the actvity of a group of items from the base period to the period under consideration?
- 6
The payoff values for decision alternatives : there are 5 states of nature and the cost value for the first decision alternative is 6 according to optimist and 5 according to pessimist. If coefficient of oprimism is 0.2, what is payoff value for the first decision alternative?
- 7
Which of the following non-parametric tests is not used for one-sample-problem?
- 8
- It shows the degree of the relationship between two continuous variables
- It uses the ρ (rho) symbols.
- It gets values between -1 and +1.
Which of the following represents these expressions?
- 9
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 ........
- 10
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?
- 11Which of the following is the correct alternative hypothesis for binomial test?
- 12
Total price and quantity for products group A is 40 and 8, and 60 and 7, as unit a and unit b, for years X and Y, respectively. What is the Fisher’s price index for A for year Y when year X is the base ?
- 13
Which of the following statements is not true regarding decision making?
- 14
In a production line, the mean weight of the products should be 450 grams and the standard deviation of the weight variable is σ = 25. It is known that the distribution of the weights of the packages follow a normal distribution. A sample of 32 observations is randomly selected from the production line in the afternoon and the sample average is found as of 448 grams.The significance level α = 0.05 for this problem.
If you follow the five step hypothesis testing procedure, what is the alternative hypothesis for the situation given above ?
- 15
Sample values for a continuous variable (noise level in a classroom ; as decibel) : 32, 38, 46, 48, 54, and 64. What is the point estimate of the population arithmetic mean?
- 16
Sample values for a continuous variable (Eskişehir Porsuk river current flow rate ; as m3 / second) : 4, 5, 8, 11, and 12. What is the point estimate of the population arithmetic mean?
- 17
Which of the following can be the null hypothesis?
- 18
A scientist found the following statistics for a hypothesis testing of two population proportions:
Population 1 : x1=12, n1=60
Population 2 : x2=30, n2= 90
What is the observed t value in this problem?
- 19
"In _________________ sampling method, the members, who are identified previously, are asked to identify other members of the population. As newly identified members name others, the sample is getting larger." Which of the following completes the blank in given sentence?
- 20
An investigator has created a sample arithmetic mean and used the number found as the population parameter value, What kind of estimation is used in this process?