If P(X<2) = 0.7 and P(X > 2) = 0.75, find E(X).
Answers
Step-by-step explanation:
The number of solar heating systems available to the public is quite large, and their heat –storage capacities are quite varied.
Here is a distribution of heat –storage capacities (in days) of 28 systems that were tested recently by University
Laboratories, Inc.:
Days Frequency
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0-0.99 2
1-1.99 4
2-2.99 6
3-3.99 7
4-4.99 5
5-5.99 3
6-6.99 1
University Laboratories, inc., knows that its report on the tests will be widely circulated and used as the basis for tax
legislation on solar-heat allowances. It therefore wants the measures it uses to be as reflective of the data as possible.
(a) Compute the mean for these data.
(b) Compute the mode for these data.
(c) Compute the median for these data.
(d) Select the answer among parts (a),(b),and(c) that best reflects the Central tendency of the test data and justif