Ünite Sınavı Soruları

An agricultural engineer wants to determine whether there is a difference in the mean yield of three different agricultural ingredients to increase the mean yield of a certain produce in a decares. What is the null hypothesis? 

For the one-way ANOVA test, the test statistic is the ratio of two variances: namely the variance between _______ and the variance within ________. 

Which option completes the blanks above?

In a one-way analysis of variance the number of groups is 8, what is the degrees of freedom for between source of variation?

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

Which of the following problems requires a two-sided test?

For sample one the sample size is 10, mean is 4.5, and standard deviation is 1. For sample two the sample size is 12, mean is 3.4, and standard deviation is 1.2 and (µ1 −µ2 ) is considered to be equal to 0. What is the test statistics for the given values? 

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?

In a two population hypothesis testing problem, if you draw the normal distribution with critical values, what do we call the inside of the critical values?

Which of the following about F Test is true?