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 the last step of hypothesis testing?

"In ..... sampling method, the members, who are identified previously, are asked to identify other members of the population. As newly identified members name others, the sample is getting larger." Which of the following completes the blank in given sentence?

I. Rejecting the null hypothesis in an ANOVA test means at least one of the means of the
population under consideration is different from the other population means. 

II. To compare two means through hypothesis testing procedure which is called one-way analysis of variance (one-way ANOVA) technique used to compare the means of two populations. 

III.  Rejecting the alternative hypothesis in an ANOVA test means at least one of the means of the population under consideration is different from the other population means. 

Which of the given statements about ANOVA test can said to be true?

In which sampling methods the sample includes the individiuals which are ready and availiable?

A researcher wants to compute the mean weight of a certain product produced by a firm. The firm produces 8000 products per day and each product has a serial number from 1 to 8000. The researcher decide to choose 80 products in order to compute average weight. He chooses the products with serial numbers 3, 103, 203,303, 403, 503......7903. Which method of sampling did the researcher apllied?

Sample values for a continuous variable (electric voltage at home ; as volt) : 204, 214, 226, 234, and 242. What is the point estimate of the population arithmetic mean?

In Eskisehir, 10 students were selected randomly from each of 3 universities to participate in a survey. Which type of sampling method was used?

Which test statistic do we use when the population variances are unkonwn and the sample size is smaller than 30?

Which of the following is true about t distribution?

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

Population of university A is 20.000, population of engineering students is 5.000 (25 % take statistics course), population of psychology students is 400 (25 % take statistics course), population of statistics students is 400. How many people are there in the target population for a survey about statistics courses?

Which one of the following is a nonprobability sampling method?

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

For the means of two normal distributions, what is the null hypothesis for two sided (two tailed) test?

where can we write down the following hypothesis

"Is there any difference for the mean number of defective products which are manufactured by two different machine operators?"

A researcher wants to decide whether the average Statistics 101 course exam scores of students of faculty of engineering and faculty of natural sciences are same or not. He takes 60 students from faculty of engineering whose average exam score is 59, and 50 students from faculty of natural sciences whose average score is 65. The variance regarding the exam scores for engineering faculty is 15, and that for natural sciences faculty is 10. What will be the z-statistics for this comparison?

Sample values for a continuous variable (noise level of a laptop computer ; as decibel) : 16, 19, 23, 24, 27, 32, 17, and 10. What is the point estimate of the population arithmetic mean?

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?