Question

Customer Day Browser Time (min) 12.0 19.5 Pages Viewed Amount Spent (S) Mon Chrome Mon Chrome Wed Chrome Sun Chrome 54.52 94.90 26.68 44.73 66.27 67.80 36.04 55.96 70.94 68.73 54.04 48.05 64.16 158.51 84.12 59.20 91.62 126.40 Wed Other Tue Firefox Sat Firefox 10.5 Fri Firefox Wed Firefox 12.7 24.7 13.3 Tue Chrome Sat Other Sun Firefox Sun Other Mon Firefox 12 13 24.4 Fri Chrome Thu Chrome Thu Chrome Mon Chrome Fri Other Wed Chrome 18 14.0 15.1 10.2 68.45 32.69 78.58 74.43 32.73 20 21 Sat Firefox Tue Chrome Sun Chrome 48.66 54.66 Tue Firefox Fri Firefox Wed Chrome Sat Chrome Sat Firefox Fri Firefox 34.69 27.91 155.30 120.25 16.9 Mon Other Thu Chrome Fri Firefox 33 Sun Chrome Fri Chrome Tue Chrome Mon Firefox 41.20 134.40 37.17 52.09 31 59.99 37 Thu Firefox 55.58 Sat Chrome Tue Chrome Wed Chrome 36.48 67.44 60.14 70.38 110.65 Tue Other 15.9 Sat Chrome Fri Firefox 44 Mon Chrome

Answer 1

> x=c(12,19.5,8.5,11.4,11.3,10.5,11.4,4.3,12.7,24.7,13.3,14.3,11.7,24.4,8.4,9.6,23.3,14,5.6,15.1,16.3,10.2,8,8,9.6,11,16.9,6,32.9,11.87.1,18,11.8,9.1,7.8,16.5,6.2,11.3,10.6,5.0,15.9,18.1,10.8,13.3,30.1,13.7,8.1,9.7,7.3,13.4)
Error: unexpected numeric constant in "x=c(12,19.5,8.5,11.4,11.3,10.5,11.4,4.3,12.7,24.7,13.3,14.3,11.7,24.4,8.4,9.6,23.3,14,5.6,15.1,16.3,10.2,8,8,9.6,11,16.9,6,32.9,11.87.1"
> x=c(12,19.5,8.5,11.4,11.3,10.5,11.4,4.3,12.7,24.7,13.3,14.3,11.7,24.4,8.4,9.6,23.3,14,5.6,15.1,16.3,10.2,8,8,9.6,11,16.9,6,32.9,11.8,7.1,18,11.8,9.1,7.8,16.5,6.2,11.3,10.6,5.0,15.9,18.1,10.8,13.3,30.1,13.7,8.1,9.7,7.3,13.4)
> mean(x)
[1] 12.81
> sd(x)
[1] 6.063314
> y=c(4,6,4,2,4,6,2,6,3,7,6,5,7,10,3,4,7,7,4,5,5,6,3,2,3,2,5,4,10,9,2,8,4,3,5,5,4,4,2,5,4,7,4,7,6,4,2,5,6,3)
> mean(y)
[1] 4.82
> sd(y)
[1] 2.037305
> z=c(54.52,94.90,26.68,44.73,66.27,67.80,36.04,55.96,70.94,68.73,54.04,48.05,64.16,158.51,84.12,59.20,91.62,126.40,68.45,32.69,78.58,74.43,32.73,48.66,54.66,40.54,34.69,27.91,155.30,120.25,41.20,134.40,37.17,52.09,71.81,59.99,84.17,55.58,39.06,36.48,67.44,60.14,70.38,110.65,104.23,68.17,17.84,103.15,52.15,98.75)
> mean(z)
[1] 68.1282
> sd(z)
[1] 32.34376
>

	time	pages	amtspent
mean	12.81	4.82	68.1282
stan.dev	6.063314	2.037305	32.34376
count	50	50	50
confidence level	[10.6013,15.0187}	[4.0779,505621]	[56.346103,79.910297]