The following two-way table shows the distribution of weekend work hours and how long employees have been at the company. A 4-column table with 3 rows. Column 1 has entries work weekends, do not work weekends, total. Column 2 is labeled less than 5 years with entries 30, 5, 35. Column 3 is labeled 5 or more years with entries 5, 10, 15. Column 4 is labeled total with entries 35, 15, 50. The columns are titled employment status and the rows are titled weekend work hours.

Suppose an employee is selected from this company at random. Let event A = work weekends and event B = worked less than 5 years. Are events A and B independent?

No, P(A) = P(B|A).
No, P(A) ≠ P(A|B).
Yes, P(A) = P(A|B).
Yes, P(A) ≠ P(B|A).

It appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking. among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately normally distributed with mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?