Statıstıcs II (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
Which of the followings presents the importance of the chain based simple index?
- 2
In Wilcoxon Rank Sum Test n1=45 and n2=40 then what is the value of E[S]?
- 3
In a significance test for Pearson correlation coefficient, it is known that the null hypothesis “Population correlation is zero” is rejected. What might be the correlation coefficient? (Number of observation is 10)
- 4
The payoff values for decision alternatives : there are 5 states of nature and the cost value for the first decision alternative is 5 according to optimist and 6 according to pessimist. If coefficient of oprimism is 0.4, what is payoff value for the first decision alternative?
- 5
________________ tests are used to determine whether a data set comes from a particular distribution?
- 6
Which of the followings is the process of creating a model of the linear relationship between independent variable and dependent variable ?
- 7
X is 18, Y is 30. What is the simple index number of X compared to Y?
- 8
What measures the relative change in price, quantity, value, or some other characteristics of interest compared to a base period?
- 9"The correlation analysis_____" Which of the following best completes the sentence above?
- 10
In a binomial test, x =35, n= 60 and P=0.55, what is the observed/calculated z value?
- 11
In The Analysis of Variance Table in Multiple Linear Regression, what is the degrees of freedom if the source of variation is error?
- 12
The payoff values for decision alternatives : there are 6 states of nature and the profit values for the first decision alternative are 550, 720, 410, 190, 780, 260. The decision maker is pessimistic. Which payoff value is taken from the first decision alternative?
- 13
If it is known that the correlation of two variables is -0.49, which of the following statements is true?
- 14
I. The mean, median and mode of the t distribution are all equal to zero.
II. The t distribution is bell-shaped and symmetrical. The total area under a t-curve is 1 or 100%
III. As the degrees of freedom decreases, the shape of the t-distribution approaches to the standard normal distribution.
Which of the given statements about properties of the t-distribution are true?
- 15What is the critical value t0 for two-sided test with α = 0.05 and n = 22?
- 16
Sample values for a continuous variable (rain drop rate ; as kg / hour) : 110, 125, 155, 130, 180, and 80. What is the point estimate of the population arithmetic mean?
- 17
- Identify the test statistic
- Select a level of significance
- State null and alternate hypotheses
- Take a sample and make the decision
- Formulate a decision rule
Which one of the following alternatives indicate the correct order of hypothesis testing steps?
- 18
The researcher intends to separate the patients according to their grade of the cancer (grade I, II, III, and IV), age (20-30, 40-59, 60-89 years) and the monthly income (less than 2500TL, 2500TL-5000TL, 5000TL and more.) How many stratum are there?
- 19
In which statistical method, we might write down the following hypothesis:
"Is there any difference for the mean number of defective products which are manufactured by two different machine operators?"
- 20
In a two population hypothesis testing problem, if you draw the normal distribution with critical values, what do we call the inside of the critical values?