Question
Daration: 20 minutes Choose the moss appropiate answer and encirclet 1 Younf s as ait cmedisones mfursng comopany Io Masimum Points: 10 ouloter manufattuting company tn the last S months he ha.old brof units per , 11,8, 13, 13, 11.15. The mean numbser of sunins be sold A 13 8 11 10 D) 08 Saltan has 1o cake delivery boys who deliver his saper cakes in Al Ain. On a national holiday his boys delivered following number of cakes in the city 20, 22,22, 10, 16,28, 17,22, 24, and 25. What was the median delivery on that holiday A) 22 B) 23 C) 24 D) 25 3. Referring to the previous example in question-2, Saced asked Sultan-What was the range of delivery orders that day What should be Sultan's reply? A) 22 B) 18 C) 28 D) 19. measures of spread dispersion can be obtained from a box-and-whisker pl A) Variance. B) Mean deviation C) Standard deviation. D) Inter-quartile range 5. If the coefficient of skewness in a data set is+1, the data distribution is A) highly peaked B) symmetric. C) less dispersed. D) positively skewed. 6. Box & Whisker plots (also known as Box plots) display 5-figure summary of a data set. W of the following does not belong to a Box & Whisker plot? A) Mode. B) Median. C) 1 &3e quartiles. D) Maximum value. 7. Inter-quartile range is
Explanation / Answer
1) The mean number here is computed as:
Mean = Sum / n = ( 5 +4 + 11 + 8 + 13 + 13 + 11 + 15)/8 = 10
Therefore c) 10 is the correct answer here.
2) The data here is arranged in ascending order first to get:
10, 16, 17, 20, 22, 22, 22, 24, 28
There are a total of 9 measurements here. The median is defined as the middle value which would be the 5th value here that is 22.
Therefore a) 22 is the correct answer here.
3) The range is computed as the difference between the max and the min value in the dataset that is 28 - 10 = 18
Therefore b) 18 is the correct answer here.
4) From box and whisker plot, the interquartile range could be obtained as the length of the box in the plot.
Therefore D is the correct answer here.
