# What is the null hypothesis tested by analysis of variance

Use the following information to answer #61 and #63. Suppose a group is interested in determining whether teenagers obtain their drivers licenses at approximately the same average age across the country. Suppose that the following data are randomly collected from five teenagers in each region of the country. The numbers represent the age at which teenagers obtained their drivers licenses. Null-Hypothesis is H0: Î¼1 = Î¼2 = Î¼3 = Î¼4 = Î¼5 Alternate Hypothesis is HÎ±: At least any two of the group means Î¼1, Î¼2, ¦, Î¼5 are not equal. 61. Find the degrees of freedom (numerator) = df(num) 63. Find the F-statistic using an ANOVA table. 69. A researcher wants to know if the mean times (in minutes) that people watch their favorite news station are the same. The table (on right) shows the results of a study. Assume that all distributions are normal, the population standard deviations are approximately the same, and the data were collected independently and randomly. Use a level of significance of 0.05. 71. Are the mean number of times a month a person eats out the same for whites, blacks, Hispanics and Asians? The table (on right) shows the results of a study. Assume that all distributions are normal, the four population standard deviations are approximately the same, and the data were collected independently and randomly. Use a level of significance of 0.05. 77. A grassroots group opposed to a proposed increase in the gas tax claimed that the increase would hurt working-class people the most, since they commute the farthest to work. Suppose that the group randomly surveyed 24 individuals and asked them their daily one-way commuting mileage. The results are as follows (see table). Determine whether or not the variance in mileage driven is statistically the same among the groups. Use a 5% significance level. 81. Is the variance for the amount of money, in dollars, that shoppers spend on Saturdays at the mall the same as the variance for the amount of money that shoppers spend on Sundays at the mall? The table (on right) shows the results of a study.Assume a 10% significance level. Do you want your assignment written by the best essay experts? Then look no further. Our team of experienced writers are on standby to deliver to you a quality written paper as per your specified instructions. Order Now, and enjoy an amazing discount!!