Statıstıcs II (ENG)
2018–2019 Final (Dönem Sonu) Çıkmış Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
In a large sample hypothesis testing for the population mean, the following statistics are calculated:
What is the calculated value of z using these statistics?
- 2
Which of the following null hypothesis can be written for hypothesis testing for the means of two normal distributions?
- 3
The correlation coefficient between two variables is −0.80. What is the coefficient of determination in this problem?
- 4
In a linear regression problem, Pearson’s correlation coefficient is 0.80 and there are 20 observations in the analysis. If the significance test for Pearson’s correlation coefficient is carried out, what is the calculated t value?
- 5
The following simple linear regression model is calculated between two variables.
The investigator in this study has observed a new value for x=15, what is the estimated value of y for this observation using the simple linear regression model?
- 6
In a simple linear regression modelling problem, standard deviation of the dependent variable is 40, standard deviation of the independent variable is 60 and the correlation coefficient between these two variables is 0.80. What is the estimated b value of the simple linear regression model?
- 7
The population size of a country in 2018 is 245,000. In order to make comparisons, the base period for population is chosen as the population size in 2001 with 150,000. What is the simple index value for 2018?
- 8
In which index the value of any given period is relative to the value of the preceding period?
- 9
Products
2016
2017
2018
2019
Apple (kg.)
70
80
90
85
Orange (kg.)
60
65
70
90
Banana (kg.)
10
11
14
16
The table shows the quantities of different products for different time periods.
What is the value of simple aggregate quantity index for 2019 by using 2017 as the base period?
- 10
Which index number shows the current buying behaviour and an accurate picture of the change in current consumption?
- 11
In a binomial test, if the sample size n = 100, and nP is less then observed value of x, what do we do while calculating z?
- 12
In a sign test, the following statistics are given, n+ = 35 and n− = 25. What is the value of P−?
- 13
Category
Observed Frequency
Expected Frequency
One
45
50
Two
60
50
Three
55
65
Four
80
75
Total
240
240
The table is created in a chi-square goodness of fit test. What is the observed chi-square value?
- 14
In an investigation, Wilcoxon Rank Sum test is used. Here are some statistics: n1=18, n2=24.
What is the value of E[S]?
- 15
In decision making, if the value of α = 1 for Hurwicz’s criterion. What can we tell about the personality of the decision maker towards the solution of this decision problem?
- 16
A decision maker has created the pay-off matrix using profits.
Profits
Rainy Days
Sunny Days
Eskişehir
150
90
Bursa
170
60
What is the value of the best decision using Hurwicz’s criterion with α = 0.40?
- 17
Profits
S.N. 1
P(S.N.1)= 0.2
S.N. 2
P(S.N.3)= 0.3
S.N. 3
P(S.N.3)= 0.5
Ahmet
70
50
60
Ali
60
40
80
Hüseyin
80
50
90
What is the expected monetary value for the best decision of the pay-off matrix with profits given in the table?
- 18
What is the graphical representation of a decision problem called?
- 19
In a systematic sampling problem, the k = 14 and n = 40, what is the population size N in this sampling problem?
- 20
If there are 9 observations in a population, how many different samples of size 3 can be created from this population?
Bir şıkka dokun; doğru cevap hemen görünür.