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The following data shows marks obtained by 40 students in a Statistics test.
75 99 72 54 25 40 65 32 69 10 85 48 52 80
63 64 35 62 51 71 67 57 95 74 56 69 61
49 45 63 39 73 53 82 76 50 66 60 55 62
Construct a grouped frequency distribution with the intervals of 10 starting from
10-19, 20-29 etc
a) Find
i) Mode
ii) Median
iii) Inter-quartile range
iv) Co-efficient of variation based on Quartile
b) Comment on the
i) Symmetry
ii) Peakedness of the distribution
Company hopes to improve customer satisfaction, setting a goal of no more than 5% negative comments. A random survey of 350 customers found only 14 with complaints. Does this provi
A. A computer rejuvenation facility receives systems from the fleet at 24 systems/day (assume this is a Poisson process). It takes the triage function 30 minutes (assumed exponen
Nortel is considering the purchase of a new call routing system. The system will cost $50M to purchase, an additional $7M to install, and will last for 30 years. The CCA rate assoc
A methodical selection of the adequate, qualified evidential issue needed to verify the equity of management''s claims in the fiscal reports or to assess whether management has wis
9. From 11 positive integer scores on a 10-point quiz, the mean is 8, the median is 8, and the mode is 7. Find the maximum number of perfect scores possible on this test.
write about scaling technique
A study done at the University of Maryland (cited in Weiss, Introductory Statistics, 7th ed, 2005) measured the body temperatures of 93 healthy humans. On the frequency- histogram
Ask questio How many women must be randomly selected to estimate the mean weight of women in one age group? We want 90% confidence that the sample mean is within 3.7 lbs of the po
What is the sampling and it importance in daily routain life. Explain stratify sampling
what is the interpretation of plots in least square method
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