Hypothesis testing for difference between two means.
A month of sales data are collected on sales of different kinds of computer products Run the t-tests to determine:
A. Is there a difference in the total sales numbers for laptops versus desktops?
B. Is there a difference in the total sales numbers for components versus desktops?
|
|
laptops
|
desktops
|
Components
|
|
Mon
|
$7,602.17
|
$12,511.13
|
$12,105.76
|
|
Tues
|
$11,618.23
|
$8,037.58
|
$26,403.16
|
|
Wed
|
$15,422.85
|
$17,301.69
|
$17,552.92
|
|
Thur
|
$16,623.54
|
$14,168.30
|
$14,445.31
|
|
Fri
|
$7,344.27
|
$5,804.46
|
$18,260.22
|
|
Mon
|
$26,522.36
|
$15,371.15
|
$11,909.67
|
|
Tues
|
$11,414.74
|
$14,663.46
|
$28,504.13
|
|
Wed
|
$16,936.27
|
$10,843.66
|
$21,985.51
|
|
Thur
|
$16,333.44
|
$9,999.81
|
$13,342.22
|
|
Fri
|
$17,766.90
|
$14,845.21
|
$20,455.42
|
|
Mon
|
$15,845.07
|
$17,784.57
|
$11,672.22
|
|
Tues
|
$11,134.35
|
$11,930.70
|
$22,231.99
|
|
Wed
|
$16,029.22
|
$10,421.93
|
$22,686.15
|
|
Thur
|
$9,141.06
|
$14,769.15
|
$8,620.69
|
|
Fri
|
$10,687.02
|
$9,499.93
|
$25,757.44
|
|
Mon
|
$10,292.05
|
$13,627.55
|
$27,020.31
|
|
Tues
|
$17,817.07
|
$28,287.28
|
$21,916.69
|
|
Wed
|
$10,197.67
|
$12,944.52
|
$13,979.96
|
|
Thur
|
$8,659.64
|
$11,159.03
|
$10,714.26
|
|
Fri
|
$17,767.90
|
$10,421.83
|
$21,975.52
|