- Can Someone Please Help 1 (27.12 KiB) Viewed 50 times
can someone please help?
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answerhappygod
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can someone please help?
can someone please help?
A stock analyst wondered whether the mean rate of return of financial, energy, and utility stocks differed over the past 5 years. He obtained a simple random sample of eight companies from each of the three sectors and obtained the 5-year rates of retum shown in the accompanying table (in percent). Complete parts (a) through (d) below Click the loon to view the datatable - X (a) State the null and alternative hypotheses. Choose the correct answer below ⒸHg: Henancial "Hanny and H,: the means are different ⒸCM, at least one of the means is different and Hand Keergy Pu DM Mancanegy "Pues and H, at least one of the means is different (b) Normal probability plots indicate that the sample data come from normal populations Are the requirements A Yas, because there are kx3 simple random samples, one from each of k populations, the samples an QB Yes, because there are k-3 simple random samples, one from each of k populations, the k samples an OC. No, because there are 3 simple random samples, one from each of a populations, the samples and POD. No, because the largest sample standard deviation is more than twice the smallest sample standard de (c) Are the mean rates of retum different at the a=0.05 level of significance? Use technology to find the F-teet statistic for this dataset Round to two decimal places needed) Rates of Return Financial 10.76 15.05 17:21 5.00 19.50 8.21 10.38 6.75 Print Energy 12.72 13.50 6.33 11.19 18.33 20,73 9.00 17.40 Utilities 11.98 5.00 13.67 9.82 3.95 3.44 7.11 15,70 Done O tributed and have the same vanance buted and have different variances buted and have the same variance
A stock analyst wondered whether the mean rate of return of financial, energy, and utility stocks differed over the past 5 years. He obtained a simple random sample of eight companies from each of the three sectors and obtained the 5-year rates of retum shown in the accompanying table (in percent). Complete parts (a) through (d) below Click the loon to view the datatable - X (a) State the null and alternative hypotheses. Choose the correct answer below ⒸHg: Henancial "Hanny and H,: the means are different ⒸCM, at least one of the means is different and Hand Keergy Pu DM Mancanegy "Pues and H, at least one of the means is different (b) Normal probability plots indicate that the sample data come from normal populations Are the requirements A Yas, because there are kx3 simple random samples, one from each of k populations, the samples an QB Yes, because there are k-3 simple random samples, one from each of k populations, the k samples an OC. No, because there are 3 simple random samples, one from each of a populations, the samples and POD. No, because the largest sample standard deviation is more than twice the smallest sample standard de (c) Are the mean rates of retum different at the a=0.05 level of significance? Use technology to find the F-teet statistic for this dataset Round to two decimal places needed) Rates of Return Financial 10.76 15.05 17:21 5.00 19.50 8.21 10.38 6.75 Print Energy 12.72 13.50 6.33 11.19 18.33 20,73 9.00 17.40 Utilities 11.98 5.00 13.67 9.82 3.95 3.44 7.11 15,70 Done O tributed and have the same vanance buted and have different variances buted and have the same variance