Male and female high school students reported how many hours they worked each week in summer jobs. the data is represented in the following box plots. box plots titled males versus females in hours worked weekly during the summer with horizontal axis labeled hours worked per week ranges from 0 to 55. females box plot with minimum approximately at 0 and maximum approximately at 20 has interquartile range approximately between 0 and 20 and median approximately at 7. males box plot with minimum approximately at 4 and maximum approximately at 50 has interquartile range approximately between 20 and 45 and median is approximately at 40. identify any values of data that may affect the statistical measures of center and spread.

Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10