200 teenagers were surveyed to determine where they get the majority of their news information. The following results were obtained: 89 from social media
54 from television
40 from online news websites
17 from print newspapers or magazines
Part A:
Based strictly on this survey, how many teenagers out of 100,000 get the majority of their news information from television?

Part B:
Based only on this survey, could we determine that of people between the ages of 13 and 25 get the majority of their news information from online news websites? Why or why not?

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An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.