The table below presents 4 years of quarterly sales for Mary’s
Mongoose Menagerie. Marty wants to know what quarterly sales will be in
2002. Project quarterly sales for 2002 using trend analysis. Now,
project quarterly sales for 2002. Revise quarterly sales number for
season of the year.
Winter 1998 20000 Winter 1999 22000 Winter 2000 23000 Winter 2001 23000
3 year
Winter 88000
Spring
1998 24000 Spring
1999 25000 Spring
2000 26000 Spring
2001 30000 3 year
Spring 105000
Summer 1998 35000 Summer 1999 36000 Summer 2000 37000 Summer 2001 38000
3 year
Summer 146000
Fall 1998 32000 Fall 1999 32000 Fall 2000 34000 Fall 2001 35000 3 year
Fall 133000
Total 111000
115000
120000
126000 3 year total 472000
Statistics Homework Solutions
#5269
Problem with statistics
I am having problems calculating this trend. Please help I came up with these numbers and I know it is wrong.
X totals 10, y totals 472000, xy totals 1205000, x2 totals 30
X=10/3=3.33 Y-472000/3=157333.33
B.)120500-(10)(3.33)(157333.333)/30-(10)(3.33)(3.33)
=50427.49
A.) 157333.33-(50427.49)(3.33)=10590.21
^
Y +10590.21+50427.49X
10590.21+50427.49(4)=212300.17
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