Total score =100
Part 1 General questions
What are the benefits of statistics? (5 points)
Explain the differences between nominal interval ration and ordinal data measurement(5 points)
For your research topic, which one you prefer to use between sampling and census, why? (5 points)
Describe the possibly causes which could lead you to wrong conclusion when you use statistics in your research. (5 points)
Part 2 Data management questions
Select any three data series and follow the questions and please select by using reasonable concept from economic and business point of view.
The data series you have been selected are? (5 points)
Compare center measurements (mean, median, mode) for each series and which one fit to your data, why?(5 points)
Construct stem- leaf display and dot plot for each series and what do you see?(5 points)
Choose one series and show frequencies distribution table (as Table 3.5 in page 64) by using Sturges’ rule to obtain number of bins.(5 points)
From 2.4) show histogram chart and compare with normal distribution curve, what are the results?(5 points)
From 2.5) what is the shape (symmetric, skew, with or without outliers) of the histogram chart?(5 points)
From 3 series, show 3 pairwise scatter plot graphs as well as trend line and equation of each picture and what are the meaning?(5 points)
Show the differences between correlation and covariance from pairwise data and which is better indicator and why?(5 points)
Select one seriesand compute all variability index, which one will you choose to represent the variation of the data and why?(5 points)
From 2.9) compare population from calculatedμ and σ for k=2 by using Chebeshve’s theorem(5 points)
Find 44th and 86th percentile for every series(5 points)
Use the same series as 2.9) and show how to compute Q1, Q2 and Q3 by using method of median and Excel’s quartile interpolation method(5 points)
Show boxplot and use fence method to find unusual data for every series(5 points)
Use midhinge concept, what is shape for each series, explain?(5 points)
Use 2.4) to find mean and standard deviation of group data. (5 points)
For overall from 2.1 up to 2.15, what are policy suggestion regarding chosen data. (5 points)
*** Bonususe any two series from your selectins construct contingency table and give an example of Bayes’s theorem.