Pls help to solve my stastistic question. Thanks alot.? - statistics on steven spielberg
Steven was asked by his company for a study on income from their customers. The annual income of 40 randomly selected customers in its customer base in a distribution facility frequency table is created, as follows:
Frequency Allocation Table (in $ '000)
Lower limit
20
31
41
51
61
71
81
91
Upper limit
30
40
50
60
70
80
90
100
Count
3
6
8
7
7
5
1
3
Cumulative Count
3
9
17
24
31
36
37
40
%
7.50
15.00
20.00
17.50
17.50
12.50
2.50
7.50
Cumulative%
7.50
22.50
42.50
60.00
77.50
90.00
92.50
100.00
a) With the index to calculate the variance and standard deviation.
b) Explain how these statistics can help in cases of Steven.
Wednesday, December 16, 2009
Statistics On Steven Spielberg Pls Help To Solve My Stastistic Question. Thanks Alot.?
2 comments:
Your data will be even easier to read. The answers have not changed, however.
Trademarks are the class 25,35,45,55,65,75,85 and 95
m = 1000 * (3 * 25 + 6 * 35 8 * 45 7 * 55 7 * 65 * 5 * 75 1 * 85 + 3 * 95) / 40 = 55750
var = 1,000,000 * (3 * 30.75 ^ 2 + 6 * 20.75 ^ 2 + 8 * 10.75 ^ 2 + 7 * 0.75 ^ 2 + 7 * 9.25 ^ 2 + 5 * 19 , 25 ^ 2 + 1 * 29.25 ^ 2 + 3 * 39.25 ^ 2) / 40 = 356,937,500
sigma = $ 18.893
Steve can be quite sure that 25% of people earn an income of less than $ 43,000 and 25% more than 68,500.
It can achieve marketing campaigns focus on specific groups
go to office hours. or stay after school for tutoring. or in front of the class.
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