This bundle brings together the WorldSupporter exam materials for Statistics 2 (International Business - Groningen)

## Practice Exam 2016/2017: Statistics II for IB - UG

Which of the following statments is TRUE?Both a bar chart and a box&whiskers plot can be used to represent qualitative data.Scatter plots can be used to represent qualitative and quantitative data both:Quantitative data. can be represented on histograms or on a box&whiskers plot.On a box&whiskefs plot the box contains the proportion of those observations which are within one standard deviation of the mean. Which of the following statments is TRUE? The statistical power of a. test increases if (ceteris paribus)..the effect size decreases, the probability of type I error decreases or the sample size decreasesthe effect size increases, the probability of type I error increases or the sample size increasesthe effect size increases, the probability of type I error decreases or the sample size increasesthe effect size decreases, the probability of type I error increases or the sample size decreases Let α denote the probability of making a type I error and ß the probability of making a type II error. Which of the following statments is TRUE?The statistical power of a test equals to 1 — α.The probability of rejecting a true nuﬂhypothesis equals 1 — ß.The probability of rejecting a false nullhypothesis 15 also known as the statistical power of the test.The probability of not rejecting a false nullhypothesis equals to α. We calculated the Mahalanobis distance of all 28 metric variables and found that the largest value belongs to Oman With 2.20. What conclusions can be drawn?Based on the Mahalanobis distance measure no observations need to be removed from the dataset.Based on the Mahalanobis...

## Practice Exam 2015/2016: Statistics II for IB – UG

Which of the following statements on type i and type II errors is correct?A type II error is the inability to reject a wrong null hypothesis.A type II error is the rejection of a true null hypothesisA type I error is the inability to reject a wrong null hypothesis.A type I error is the rejection of a true null hypothesis. Which kind of relation do we have between Type I and II errors?The probability of a Type II error increases as the probability of a Type i error increases.Type I and II errors are independent.The probability of a Type II error decreases as the probability ofa Type I error increases.Type I and II errors are directly proportional. Consider to choose among tests, in order to achieve a given power level. In other words, you have a target power for your test, which statement is correct?We cannot increase power by choosing a larger alpha level.Other things being equal, for a greater effect size we need a larger sample size to achieve the target power.We cannot increase power by choosing a larger sample size.A smaller alpha level typically requires a larger sample to achieve the target power. A scatter plot of number of teachers (T) and number of people with University degrees in Dutch cities (P) shows a positive relation. Which is the most likely explanation for this positive association?Teachers at any school...

## Statistics II: Summaries, Study Notes and Practice Exams - UG

- This bundle contains Summaries, Study Notes and Practice Exams for the course Statistics

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