Business Statistics Module 7

Business Statistics Module 7 - In a study by WebCriteria,...

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In a study by WebCriteria, it took an average of 2.1 minutes to locate information and buy produ compared to an average of 2.7 minutes on the British Airways site. Assume that data file XR110 during visits to the two websites. In a suitable one-tail test at the 0.01 level, was the mean time f less than that for the British Airway visits? Indentify and interpret the p-value for the test. Delta British t-Test: Two-Sample Assuming Equal Variances 2.12 2.44 1.40 2.51 Delta British 2.03 2.48 Mean 2.1 2.7 2.00 2.88 Variance 0.16 0.15 2.34 2.60 Observations 25 21 1.63 2.38 Pooled Variance 0.16 1.96 2.77 Hypothesized Mean 0 3.36 2.96 df 44 1.69 2.82 t Stat -5.14 2.01 2.45 P(T<=t) one-tail 0 1.86 3.29 t Critical one-tail 2.41 2.08 3.05 P(T<=t) two-tail 0 2.61 2.03 t Critical two-tail 2.69 1.62 3.18 1.67 2.65 2.17 2.94 2.69 3.31 2.34 2.93 2.25 1.79 1.89 2.54 1.96 2.70 2.37 2.10 2.29 2.06
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ucts on the Delta Airlines website, 012 contains the times (in minutes) required for the Delta visits significantly H0 can be rejected; we can determine that Delta visits are significanctly less than British Airways.
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product. The product-development team for a notebook computer company has shown picture A to a asking each person to indicate what they "would expect to pay" for such a product. The data resulting 0.05 level of signifcance, determine whether the prototypes might not really differ in terms of the price interpret the p-value for the test. Construct and interpret the 95% confidence interval for the difference difference (0.00) within interval? Given the presence or absence of the 0.00 value within the interval, ComputerA ComputerB 3317 2965 t-Test: Two-Sample Assuming Unequal Variances 2680 3083 3286 3137 ComputerA ComputerB 2859 2950 Mean 3049.04 3122.55 2693 3161 Variance 51921.73 22129.07 2945 2918 Observations 45 40 2908 3158 Hypothesized Mean Di 0 3193 3082 df 76 3240 2903 t Stat -1.78 3040 3103 P(T<=t) one-tail 0.04 2906 3042 t Critical one-tail 1.67 3285 3041 P(T<=t) two-tail 0.08 3126 3234 t Critical two-tail 1.99 3114 2985 3079 3070 3054 3061 3089 2947 3006 3035 3323 3042 2944 3261 3099 3410 3387 3396 3073 3229 3517 3191 2668 3091 3025 3322 3096 3291 3349 2883 2851 2902 2943 3286 3430 3209
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This note was uploaded on 03/18/2011 for the course BUS 360 taught by Professor Jamesgoff during the Spring '10 term at Grand Canyon.

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Business Statistics Module 7 - In a study by WebCriteria,...

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