1. Question 1 5/5 What is Science? All qualities mentioned in the other three options. 2. Question 2 5/5 What is a well-known feature of the normal probability distribution? Bell-shaped. Question 3 When comparing two mean values 1 and 2, what kind of problems call for one-tail tests? Estimating whether 1 < 2 or whether 1 > 2 (but not both) 3. Question 4 In a nutshell, what does one-way ANOVA do? It uses the F-test to compare two variance estimates and decide whether the variance due to the change of a particular factor, is more significant than random fluctuations. 4. Question 5 5/5 Which one is false? Unbiased sampling is a way to exclude representative samples. Question 6 5/5 When is one-way ANOVA typically used? When comparing error variance to between-group variance. When investigating the effect of various factors on the behaviour of a population. 5. Question 7 0/5 A testbed is useful, among others, in Identifying the ground truth Question 8 We can use the chi-square test in one of the following cases Comparing categorical data where other tests are not readily applicable. Question 9 5/5 We are told that the mean and the variance of a given population has been reliably estimated by its sampling distribution, using sample size N=30. This is valid courtesy of The Central Limit Theorem. 6. Question 10 5/5 Which one is false? Show answer choices We can carry out set operations on outcomes such as union, intersection, and more. Whatever occurs as a result when we run a random experiment once is an observation. The set of all possible results is the sample space. Random experiments can have more than one fully predictable results. 7. Question 11 5/5 Starting with simple experiments is advisable. However... unexpected elements and complications may arise during our first, simple experiments. 8. Question 12 5/5 Which one is true? Show answer choices Robust statistics are more sensitive to data variability. The mean is the most robust central-tendency statistic. All other three options are false. The median is preferred over the mean in terms of robustness. 9. Question 13 5/5 Given the level of confidence p, the wider the confidence interval of the mean, ... the lower the accuracy of its estimate. Question 14 5/5 Random variable X ranges from -1.5 to +1.5 with confidence level 95%. What is the level of significance of observations falling anywhere outside this range? 5% Question 15 5/5 Which test is used to compare two variances? F-test 10. Question 16 5/5 Reproducibility aims at allowing others to test our results independently. 11. Question 17 5/5 Which one is false? The central tendencies of a population are typically described by such measures as the deviation 12. Question 18 5/5 What would you call a sample with a frequency distribution of the random variable under study, resembling closely the one of the parent population? Representative. 13. Question 19 5/5 Giving every possible sample of a given size, equal opportunities to be chosen. 14. Question 20 5/5 You are told that the Pearson's coefficient of correlation between data sets A and B, is 1.5. What do you think about this statement? The calculation of the correlation coefficient, was blatantly wrong