Statıstıcs Iı Final 2. Deneme Sınavı

1.Soru

In a binomial test, if the Q is 0.30, what is the value of P?

0.20

0.30

0.50

0.70

0.90

2.Soru

What is the smallest value for Pearson's correlation coefficient?

1

0

-8

3

-1

3.Soru

Total price for products group A is 14 and 16 units for months X and Y, respectively. What is the simple aggregate price index for A for month X when month Y is the base?

224

30

400 / 3

250 / 7

87.5

4.Soru

Which of the following can be writen as a null hypothesis for The Chi-square Goodness of Fit Test?

The population distribution is normal distribution.

The population distribution is uniform.

Distribution for duration of service is uniform distribution.

The two populations are identical.

The distribution of differences is symmetrical around MD = 0.

5.Soru

The payoff values for decision alternatives : there are 5 states of nature and maximum payoff values for 5 decision alternatives are I) -0.15, II) -0.11, III) -0.72, IV) -0.27, V) -0.34. The decision maker is pessimistic. Which decision alternative is choosen?

I

II

III

IV

V

6.Soru

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 ? = 0.1.

Given the information above, what can we conclude about the mean online store price of the product?

The average price of the product at online stores is less than 180 TL.

The average price of the product at online stores is more than 180 TL.

The average price of the product at online stores is 180 TL.

The average price of the product at online stores is 175 TL.

The average price of the product at online stores is 171 TL.

7.Soru

In Pearson's correlation coefficient, which value shows that there is a perfect relationship between the two variables?

1

2

3

4

5

8.Soru

In Wilcoxon Signed Rank Test if n=25 then what is the value of E[S]?

185.50

162.50

142.50

132.50

122.50

9.Soru

A ________________ index number is constructed to show the changes when there are a number of different items collected together?

simple

composite

aggregate

average

quantity

10.Soru

An ______________ measures the relative change in price, quantity, value, or some other characteristics of interest compared to a base period?

Average

Mode

Index number

Standard deviation

ANOVA

11.Soru

What is the most appropriate correlation coefficient value for the data set shown in the following scatterplot?

-1

-0.50

0

0.15

0.95

12.Soru

Price of X is 56, and 84 units on February, and May, respectively. January is the base period. What is the fixed based simple price index for May?

20

30

150

200 / 3

140

13.Soru

In decision making, at least how many decision alternatives are necessary?

1

2

3

4

5

14.Soru

Monthly sales of companies X and Y are 30 units and 40 units, respectively. What is the index for X compared to Y?

1.200

400 / 7

300 / 7

400 / 3

75

15.Soru

Here are some values to calculate correlation coefficient;

= 980

n=30

s_x=5

s_y=8

What is the value of the correlation coefficient?

0.29

0.58

0.65

0.78

0.84

16.Soru

In a simple linear regression model, which of the following is used to represent random error?

y

x

ε

α

β

17.Soru

In simple linear regression model, what does SSR stand for?

Total variation

Unexplained variation

Observation

Explained variation

Estimate

18.Soru

What would be the best action under minimin criterion?

A1

A2

A3

A4

A5

19.Soru

In a problem, the coefficient of determination is found 0, 5625. What is the correlation coefficient?

1

0,90

0,75

0,50

0,25

20.Soru

What is the expected monetary value of the decision alternative A3?

65.12

78.6

102.9

114.2

84.80