حل أوراق عمل Basic Statistics الرياضيات المتكاملة الصف الثاني عشر

حل أوراق عمل Basic Statistics الرياضيات المتكاملة الصف الثاني عشر

1: Value of [(n +1) ⁄ 4]th term is the formula of
A. 1st quartile
B. 2nd quartile
C. mode
D. 3rd quartile

Answer: A
2: The middle observation in an arranged set of data is called
A. mean
B. mode
C. median
D. range
Answer: C

3: The nth root of the product of the values x1, x2, x3, ….., xn is called
A. arithmetic mean
B. geometric mean
C. variance
D. harmonic mean

Answer: B
4: A bar chart constructed in which the area of each bar is proportional to the number of items in each group is known as
A. pi chart
B. histogram
C. frequency distribution table
D. polygon

Answer: B
5: 1st quartile is also known as
A. lower quartile
B. upper quartile
C. median
D. geometric mean
Answer: A

6: Value of [3(n +1) ⁄ 4]th term is the formula of
A. variance
B. 3rd quartile
C. 2nd quartile
D. geometric mean
Answer: B

7: The square of the standard deviation is called
A. harmonic mean
B. variance
C. mode
D. 2nd quartile

Answer: B
8: In the set 2, 4, 5, 4, 6, 5, 3, 4, 2, the mode is
A. 2
B. 5
C. 4
D. 3
Answer: C

9: When the cumulative frequencies are plotted against the end points of their respective class intervals and joined together, the resultant graph is called
A. cumulative frequency pentagon
B. cumulative frequency histogram
C. cumulative frequency hexagon
D. cumulative frequency polygon
Answer: D

10: The table which shows the frequency of each score is called a
A. polygon
B. pi chart
C. histogram
D. frequency distribution table
Answer: D

11: 3rd quartile is also known as
A. lower quartile
B. upper quartile
C. median
D. geometric mean
Answer
Answer: B

12: The monthly income of 5 persons are 3000, 5000, 4000, 2000 and 6000. Their arithmetic mean should be
A. 4000
B. 6000
C. 5000
D. 3500
Answer
Answer: A

13: The positive square root of the mean of the squared deviations of the values from their mean is known as
A. standard deviation
B. median
C. variance
D. harmonic mean
Answer: A

14: The harmonic mean of 3, 4 and 8 is
A. 3.43
B. 3
C. 4
D. 8
Answer: A

15: The geometric mean of 2, 4 and 8 is
A. 3
B. 5
C. 2
D. 4
Answer: D

16: Value of [(n +1) ⁄ 2]th term is the formula of
A. 2nd quartile
B. median
C. 1st quartile
D. both A and B
Answer: D

17: A many sided closed figure used in frequency distribution is termed as
A. frequency polygon
B. frequency hexagon
C. frequency pentagon
D. frequency decagon
Answer: A

18: By adding all numbers in the set together and then total is divided by the number of scores in that set, we obtained
A. geometric mean
B. arithmetic mean
C. standard deviation
D. variance
Answer: B

19: The total number of observations, which are below a certain value are known as
A. class boundaries
B. class marks
C. cumulative frequency
D. variances
Answer: C

20: The most frequent observation in a data set is called
A. mode
B. median
C. range
D. mean
Answer: A

21: Frequency polygon is constructed by plotting frequencies against their
A. standard deviations
B. class marks
C. variances
D. means
Answer: B

22: The range in the data 18, 25, 12, 13, 8, 9, 20 is equal to
A. 11
B. 33
C. 13
D. 17
Answer: D

23: The summary statistics which measure the middle or center of the data are called
A. logarithms
B. measures of central tendency
C. measures of dispersion
D. proportions
Answer: B

24: The sum of deviations of values from their mean is always
A. 1
B. 0
C. 2
D. 3
Answer: B

25: The average of all observations in a set of data is known as
A. median
B. range
C. mean
D. mode
Answer: C

26: The median in the set 6, 4, 2, 3, 4, 5, 5, 4 would be
A. 3
B. 6
C. 5
D. 4
Answer: D

27: Cumulative frequency polygon is also called
A. ogive
B. histogram
C. absicca
D. sigma
Answer: A

28: Mean, median and mode are the part of
A. measures of central tendency
B. measures of dispersion
C. logarithms
D. proportions
Answer: A

29: The number of times each value appears is called the value’s
A. range
B. mode
C. frequency
D. standard Deviation
Answer: C

30: The three points that divides the set into 4 equal group are called
A. deciles
B. percentiles
C. quartiles
D. none of above
Answer: C