Ünite Sınavı Soruları

Which is the first step to test the claims made about the population parameters?

1. Formulate a decision rule

2. Identify the test statistic 

3.  State null and alternate hypotheses

4. Select a level of significance

5. Take a sample and make the decision

What is the correct order of the hypothesis testing steps given above? 

For a statistical test following a normal distribution, the alternative hypothesis is that the mean equals to a hundred and the standard deviation is s = 20.  A sample of 25 observations is randomly selected and the sample average is equal to 102. What is the test statistic equal to?

For two-sided test on one population hypothesis testing with α = 0.05 and n = 15, what is the degrees of freedom?

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.

What should be alternate hyphothesis in this situation?

What is the critical value z for one-sided test with %90 confidence level?

Which one of the following statements is true about the statistical decision for question 9?

 What does the term '1-β' indicate?

In an investigation, if the significance level is 0.47, what is the confidence level in this study?

if the type I error is 0.05 and a two-sided hypothesis testin is investigated, what is the z value from the standard normal distribution table?

What is a value that defines the characteristic of a whole population called?

what is the total size of the rejection region in hypothesis testing?

I. Choose the level of significance α.

II. Determine the population proportion under study and form the null hypothesis (H0 ) and the alternative hypothesis (H1 ).

III. Identify the critical points and critical region for the hypothesis test.

IV. Calculate the test statistic z for proportions.

V. Based on sample information decide to reject or fail to reject the null hypothesis (H0 ) and interpret the results of the hypothesis test.

What is correct order of the steps of hypothesis testing given above?

In a classroom there are 25 students. Out of these 25 students 10 of them are male. If a hypothesis testing procedure for the population proportion of female students is to be created, what is the value of the sample proportion of the female students?

Which of the following can be the null hypothesis?

How is the power of a statistical test calculated?

For α = 0.567 significance level what is the rejection area under the standard normal curve for one-sided tests?

If you reject the null hypothesis when the null hypothesis is false, what is the decision?

For α = 0.24 significance level what is the acceptance area under the standard normal curve for two-sided tests?