Preliminary data analyses indicate that it is reasonable to consider the assumptions for one-way ANOVA satisfied....
40 pts Preliminary data analyses indicate that it is reasonable to consider the assumptions for one-way ANOVA satisfied. Perform the required hypothesis test using the critical-value approach. At the 0.01 significance level, do the data provide sufficient evidence to support the claim that a difference exists between the population means of the three different brands? The sample data are given below. 47 Brand A Brand B Brand C 44 30 28 32 27 44 34 31 40 36 38 36...
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Preliminary data analyses indicate that the assumptions for using pooled t-procedures are satisfied. Independent random samples of 102 plots with cropland and 100 plots with grassland yielded the given summary statistics for the number of species of bird. At the 1% significance level, do the data provide sufficient evidence to conclude that a difference exists in the mean number of species in the two regions? Cropland Grassland x overbar 1 = 14.51 x overbar 2 = 15.33 s 1 =...
Preliminary data analyses indicate that it is reasonable to use a t-test to carry out the specified hypothesis test. Perform the test using the critical value approach Use a significance level of 0.05 to test the claim that 326 The sample data consists of 15 scoms for which X-384 and 58 TTTT Paragraph Arial 312) ET %DOQ T T. O SOM -
Preliminary data analyses indicate that the assumptions for using pooled t-procedures are satisfied. Independent random samples of 103 plots with cropland and 99 plots with grassland yielded the given summary statistics for the number of species of bird. At the 5% significance level, do the data provide sufficient evidence to conclude that a difference exists in the mean number of species in the two regions? Cropland Grassland x overbar 1 equals 14.12 x overbar 2 equals 15.87 s 1 equals...
Preliminary data analyses indicate that it is reasonable to use at test to carry out the specified hypothesis test. Perform the t-test using the critical value approach. A light bulb manufacturer advertises that the average life for its light bulbs is 900 hours. A random sample of 15 of its light bulbs resulted in the following lives in hours. 995 590 510 539 739 917 571 555 916 728 664 093 708 87349 At the 10% significance level do the...
Preliminary data analyses indicate that the assumptions for using pooled t-procedures are satisfied. Independent random samples of 104 plots with cropland and 98 plots with grassland yielded the given summary statistics for the number of species of bird. At the 55% significance level, do the data provide sufficient evidence to conclude that a difference exists in the mean number of species in the two regions? Cropland Grassland x overbar 1 equals 14.44 x overbar 2 equals 15.66 s 1 equals...
Preliminary data analyses indicate that you can reasonably consider the assumptions for using pooled t-procedures satisfied. Independent random samples of 103 plots with cropland and 99 plots with grassland yielded the given summary statistics for the number of native species. Cropland: x bar 1= 14.62 s1=4.74 n1=103 Grassland: x bar 2= 15.89 s2=4.91 n2=99 The 98% confidence interval is from ? to ?
Preliminary data analyses indicate that you can reasonably consider the assumptions for using pooled t-procedures satisfied. Independent random samples of released prisoners in the fraud and firearms offense categories yielded the following information on time served, in months. Obtain a 95% confidence interval for the difference between the mean times served by prisoners in the fraud and firearms offense categories. Fraud 17.7 16.4 8.4 17.4 12.3 17.2 17.5 16.9 7.9 14.5 Firearms 15.9 23.5 18.2 12.4 22.2 24.4 24.1 9.7...