Deneme Sınavı Soruları

What is the decision reached as a result of hypothesis testing process?

In this test, the alternative hypotheses are constructed in three different ways. The hypotheses are shown as follows.

H0 :The distribution of differences is symmetrical around MD = 0

H1a :The differences tend to be larger than MD = 0

H1b :The differences tend to be smaller than MD = 0

H1c :The differences tend to be larger than MD = 0 or smaller than MD = 0

Which test do the hypotheses given above belong to?

For profit situations of some firms compared to firm E, the index numbers are followings;

• Firm A - 25
• Firm B - 55
• Firm C - 130
• Firm D - 100

Which of the following presents the ranking of firms from successful to less successful?

The following table shows the simple index numbers for a variable. What is the value of the base period.

The payoff values for decision alternatives : there are 5 states of nature and the profit values for the first decision alternative are 69, 78, 54, 40, 87. The decision maker is optimistic. Which payoff value is taken from the first decision alternative?

A teacher wants to investigate whether there is a relationship between students' self-efficay and their exam results. 10 students were randomly picked up and their values were recorded and given in the table above. What is the Pearson correlation coefficient between students' self-efficacy scores and their achievement?

The estimated simple linear regression model is y= 65 + 2.45 * x, what is the y value according to model if x=12?

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?

Which of the followings are true definitions about index number?

1. It measures the relative change
2. It considers the periods
3. It is a statistical value
4. It considers a reference value
5. It can not transformed an equation
    

Which one of the following values cannot be calculated for Spearman's rank correlation coefficient?

The payoff values for decision alternatives : there are 5 states of nature and maximum payoff values for 6 decision alternatives are I) -0.51, II) -0.22, III) -0.36, IV) -0.14, V) -0.43, VI) -0.87 . The decision maker is pessimistic. Which decision alternative is choosen?

In an investigation, the monthly electricity consumption (kw) of a family of four is estimated by the size of the house (in meter squares). It is going to be a big project, but the investigator creates a pilot study with 10 family homes in a small town. Here are the data values below;

Which of the following is the simple linear regression model for the case above?

A researcher wants to test whether the average exam scores of two student groups (X and Y respectively) are same or not. How will he/she formulate null hypothesis (H₀) and alternative hypothesis (H₁)?

In an investigation, the probability of failing to reject the null hypothesis (H0) when it is false is 0.05. What is the test power in this study?

The observed z value is 3.62 and theoretical z value is 1.96, then what is the conclusion for hypothesis testing?

Which of the given forms of hypothesis equivalently is one that is correct?

A survey to search out the preferences of teenagers in Istanbul about novel selection was conducted accordingly: 80 girls and 80 boys, aged between 14-18, were asked the same questions such as the last novel they read, etc. For the design of the study, which is a wrong statement?

A random sample of a data set is as follows: 3, 4, 4, 4, 7,4, 5, 6, 7, and 9. What is the point estimate of the population arithmetic mean?