Agroup of 121 internet users 50-65 years of age were randomly chosen and asked to report the weekly number of hours they spend online. the purpose of the study was to determine whether the mean weekly number of hours that internet users in that age group spend online differs from the mean for internet users in general which is 12.50 hours. a 95% confidence interval for the mean weekly number of hours that internet users in that age group spend online was calculated to be (11.439 , 12.577). on the basis of this interval, at α = 0.05, what can she conclude about h0: μ = 12.50 versus ha: μ ≠ 12.50?

Is each relation a function? if so, state whether it is one-to-one or many-to-one. 3. (-4,7), (-3,5), (1,4), (3,-8), (5,-11) 4. (-4,8), (-2,4), (0,1), (2,4), (4,8) 5. (-2, 1), (-2,3), (0,-3), (1,4), (3,1)

The table shows population statistics for the ages of best actor and best supporting actor winners at an awards ceremony. the distributions of the ages are approximately bell-shaped. compare the z-scores for the actors in the following situation. best actor best supporting actor muequals42.0 muequals49.0 sigmaequals7.3 sigmaequals15 in a particular year, the best actor was 59 years old and the best supporting actor was 45 years old. determine the z-scores for each. best actor: z equals best supporting actor: z equals (round to two decimal places as needed.) interpret the z-scores. the best actor was (more than 2 standard deviations above more than 1 standard deviation above less than 1 standard deviation above less than 2 standard deviations below) the mean, which (is not, is) unusual. the best supporting actor was (less than 1 standard deviation below more than 1 standard deviation above more than 2 standard deviations below more than 1 standard deviation below) the mean, which (is is not) unusual.

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