Manufacturer 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Life 684 831 859 893 922 939 972 1016 697 835 860 899 924 943 977 1041 720 848 868 905 926 946 984 1052 773 852 870 909 926 954 1005 1080 821 852 876 911 938 971 1014 1093 819 907 952 994 1016 1038 1096 1153 836 912 959 1004 1018 1072 1100 1154 888 918 962 1005 1020 1077 1113 1174 897 942 986 1007 1022 1077 1113 1188 903 943 992 1015 1034 1082 1116 1230 1=Sylvania 2=Philips Two Sample Tests 1) Philips claims that their hundred watt light bulbs last longer than Sylvania's. They collect 40 of their own light bulbs and 40 of the light bulbs produced by Sylvania and measure the lengths of life (in hours) for both samples. This is in file \"Bulbs\". Is Philips correct? Conduct an appropriate test to t and explain if they are or not and why (Pick you own alpha value) ___________________________________________________________________________________ 2) The manufacturer of Boston and Vermont asphalt shingles knows that product weight is a major factor in the customer's perception of quality. Moreover, the weight represents the amount of raw materials being used and is therefore very important to the company from a cost standpoint. The last stage of the assembly line packages the shingles before they are placed on wooden pallets. Once a pallet is full (a pallet for most brands holds 16 squares of shingles), it is weighed and the measurement is recorded. The file \"Pallet\" contains the weight (in pounds) from a sample of 368 pallets of Boston shingles and 330 pallets of Vermont shingles. Is there a difference in the weights of the Boston and Vermont shingles? (Pick your own alpha value) ___________________________________________________________________________________ 3) AMS communicates with customers who subscribe to cable television services through a special secured email system that sends messages about service changes, new features, and billing information to in-home digital set-top boxes for later display. To enhance customer service, the operations department established the business objective of reducing the amount of time to fully update each subscriber's set of messages. The department selected two candidate messaging systems and conducted an experiment in which 15 randomly chosen cable subscribers were sampled. The update process for each subscriber email was measured for each of the two messaging systems. The data is in file \"AMS10\". Is there a difference in these two messaging systems? Conduct the appropriate test and analyze the results (pick your own alpha) ___________________________________________________________________________________ 4) A hotel manager looks to enhance the initial impression that hotel guests have when they check in. Contribution to initial impressions is the time it takes to deliver a guest's luggage to the room after check-in. A random sample of 20 deliveries on a particular day were selected in Wing A of the hotel, and a random sample of 20 deliveries were selected in Wing B. The results are in file \"Luggage\". Is Wing A worse than Wing B? Conduct the appropriate test and analyze the results (pick your own alpha value Page 1 of 1 Email Interface1 Email Interface 2 4.13 3.71 3.75 3.89 3.93 4.22 3.74 4.57 3.36 4.24 3.85 3.90 3.26 4.09 3.73 4.05 4.06 4.07 3.33 3.80 3.96 4.36 3.57 4.38 3.13 3.49 3.68 3.57 3.63 4.74 Wing A Wing B 10.70 7.20 9.89 6.68 11.83 9.29 9.04 8.95 9.37 6.61 11.68 8.53 8.36 8.92 9.76 7.95 13.67 7.57 8.96 6.38 9.51 8.89 10.85 10.03 10.57 9.30 11.06 5.28 8.91 9.23 11.79 9.25 10.59 8.44 9.13 6.57 12.37 10.61 9.91 6.77 Boston Vermont 3202 3792 3134 3652 3134 3652 3226 3726 3236 3728 3250 3676 3266 3704 3224 3656 3088 3666 3132 3648 3098 3708 3118 3682 3094 3680 3108 3670 3100 3728 3084 3708 3134 3678 3090 3660 3154 3718 3138 3636 3156 3644 3138 3684 3130 3688 3118 3724 3112 3682 3168 3660 3166 3672 3122 3692 3160 3672 3146 3700 3124 3694 3170 3706 3132 3650 3162 3692 3156 3746 3136 3728 3162 3726 3136 3714 3136 3730 3148 3768 3152 3740 3166 3720 3202 3626 3152 3692 3154 3730 3126 3726 3098 3734 3106 3712 3122 3684 3118 3718 3164 3742 3158 3736 3122 3730 3064 3666 3176 3664 3144 3688 3156 3694 3162 3684 3130 3688 3156 3688 3184 3702 3170 3676 3176 3656 3152 3632 3162 3652 3200 3658 3202 3684 3142 3670 3170 3678 3142 3674 3154 3674 3158 3634 3106 3684 3136 3708 3170 3670 3124 3684 3174 3746 3160 3688 3162 3702 3160 3666 3118 3670 3138 3700 3132 3658 3140 3664 3134 3166 3122 3154 3130 3106 3092 3136 3150 3138 3214 3092 3162 3126 3086 3112 3138 3118 3156 3156 3144 3160 3166 3172 3134 3186 3146 3144 3124 3122 3116 3126 3140 3110 3128 3114 3138 3106 3142 3128 3142 3144 3122 3046 3062 3114 3100 3126 3088 3140 3140 3120 3132 3130 3140 3114 3108 3146 3172 3102 3120 3102 3132 3120 3088 3084 3120 3098 3096 3088 3092 3062 3084 3136 3080 3056 3064 3088 3110 3096 3094 3080 3074 3114 3136 3682 3672 3730 3712 3720 3700 3722 3728 3692 3726 3686 3708 3732 3724 3730 3698 3686 3680 3732 3718 3700 3718 3666 3714 3706 3718 3712 3688 3736 3706 3720 3714 3740 3724 3744 3728 3728 3680 3652 3634 3640 3728 3724 3704 3668 3684 3652 3756 3702 3840 3696 3702 3732 3736 3752 3696 3732 3702 3640 3672 3756 3710 3736 3726 3800 3784 3804 3740 3730 3778 3718 3810 3786 3766 3736 3738 3726 3764 3678 3728 3716 3856 3816 3792 3808 3104 3080 3104 3082 3080 3074 3095 3098 3084 3086 3074 3092 3062 3108 3132 3122 3078 3180 3076 3072 3114 3080 3102 3074 3148 3112 3112 3118 3118 3094 3076 3050 3100 3114 3100 3104 3088 3148 3088 3074 3074 3094 3116 3104 3100 3112 3098 3086 3098 3136 3100 3122 3132 3120 3096 3100 3114 3128 3084 3098 3104 3124 3130 3088 3110 3126 3116 3110 3148 3082 3142 3116 3092 3106 3102 3096 3078 3116 3164 3124 3102 3120 3114 3086 3160 3802 3746 3800 3780 3756 3768 3768 3728 3724 3736 3760 3708 3688 3650 3636 3628 3656 3630 3730 3662 3746 3726 3702 3678 3676 3738 3598 3718 3738 3766 3750 3740 3784 3760 3804 3798 3804 3714 3720 3760 3650 3686 3750 3690 3686 3718 3732 3702 3706 3660 3686 3650 3678 3708 3706 3646 3698 3644 3642 3746 3714 3674 3626 3592 3642 3646 3734 3654 3672 3684 3692 3676 3666 3640 3704 3650 3616 3706 3770 3740 3726 3706 3756 3724 3718 3172 3164 3176 3124 3102 3164 3152 3144 3146 3166 3096 3146 3134 3128 3176 3166 3186 3158 3136 3124 3196 3178 3150 3160 3092 3122 3116 3122 3128 3172 3164 3066 3116 3132 3124 3148 3138 3118 3098 3132 3062 3116 3148 3122 3140 3134 3166 3136 3068 3134 3116 3152 3124 3106 3080 3092 3142 3112 3094 3092 3132 3118 3152 3124 3146 3098 3168 3174 3106 3184 3134 3104 3140 3108 3098 3186 3180 3122 3124 3148 3166 3080 3112 3144 3142 3706 3654 3730 3734 3704 3734 3662 3640 3618 3644 3586 3566 3674 3842 3764 3650 3652 3740 3814 3754 3714 3634 3626 3658 3672 3662 3662 3666 3732 3710 3648 3714 3748 3732 3658 3680 3762 3636 3700 3754 3756 3652 3700 3664 3672 3658 3750 3662 3762 3742 3788 3668 3658 3726 3704 3654 3684 3774 3770 3788 3646 3660 3696 3704 3722 3682 3636 3630 3630 3728 3692 3688 3694 3694 3744 3734 3112 3094 3066 3136 3128 3072 3090 3080 3092 3076 3098 3102 3076 3044 3112 3092 3094 3066 3098 3082 3146 3144 3098 3068 3098 3140 3130 3088 3082