Does network performance vary between providers? The accompanying data table provides the download speed (in Mbps) on wireless connections of Company X and Company Y in 23 cities. Complete parts (a) through (d). Click the icon to view the data table. a. At the 0.01 level of significance, is there evidence of a difference in the mean download speed between Company X and Company Y? Let u, be the population mean download speed of Company X and let u, be the mean download speed of Company Y. State the null and alternative hypotheses. Choose the correct answer below. O A. Ho: HD =0 (where HD = #1/H2) O B. Ho: HD = 0 (where HD = #1 - 12) H1 : HD # 0 H 1 : HD >0 O C. Ho: HD #0 (where HD = M1 - 12) O D. Ho: HD = 0 (where HD = (1 - 12) Hy : HD = 0 Hy : HD 0 O E. Ho: HD = 0 (where HD = Hy - 12) OF. Ho: HD =0 (where Up = Hq /H2) Hy : HD # 0 Hy : HD 20 The test statistic is. (Round to two decimal places as needed.) The p-value is (Round to three decimal places as needed.) Since the p-value is the value of a, There is evidence of a difference in the mean download speeds between Company X and Company Y.b. What assumption about the download speeds is necessary to perform this test? O A. It must be assumed that the distribution of the differences between the measurements is approximately normal. O B. It must be assumed that the distribution of the differences between the measurements is skewed. O C. It must be assumed that the distribution of the differences between the measurements is approximately uniform. c. Use a graphical method to evaluate the assumption made in (a). Construct a boxplot of the differences. Choose the correct graph below. O A. O B. O C. OD. -14.48 7.03 -14.48 7.03 -14.48 7.03 -14.48 7.03 Paired Difference Paired Difference Paired Difference Paired Difference Does the assumption needed in order to conduct the t test in (a) appear to be valid? O A. No, because the boxplot does not indicate severe departure from normality. O B. Yes, because the boxplot does not indicate severe departure from normality. O C. Yes, because the boxplot shows that the data are significantly skewed. O D. No, because the boxplot shows that the data are significantly skewed.d. Construct and interpret a 99% confidence interval estimate of the difference in the mean download speed between Company X and Company Y. SHD S (Round to two decimal places as needed.) Interpret this interval. Choose the correct answer below. O A. With 1% confidence, the difference in the mean download speed between Company X and Company Y falls in this interval. O B. With 1% confidence, any sample mean difference in the download speed between Company X and Company Y falls in this interval. O C. With 99% confidence, any sample mean difference in the download speed between Company X and Company Y falls in this interval. O D. With 99% confidence, the difference in the mean download speed between Company X and Company Y falls in this interval.- X Data Table City Company X Company Y City 1 63.67 71.1 City 2 64.17 70.24 City 3 64.36 66.03 City 4 61.68 71.64 City 5 67.63 73.1 City 6 62.11 70.77 City 7 67.14 72.83 City 8 62.34 73.71 City 9 68.53 75.2 City 10 62.99 71.82 City 11 66.66 73.42 City 12 75.84 69.81 City 13 66.8 70.56 City 14 63.47 69.37 City 15 67.29 69.33 City 16 67.89 75.58 City 17 63.66 70.32 City 18 65.41 72.8 City 19 57.64 71.12 City 20 63.4 69.21 City 21 66.49 71.26 City 22 70.49 70.78 City 23 67.76 68.91 Print Done