From previous studies, it has been generally believed that Northern
Hemisphere icebergs have a mean depth of 270 meters and a standard
deviation of 20 meters. An environmentalist has suggested that global
warming has caused icebergs to have greater depth. A team of
scientists visiting the Northern Hemisphere observed a random sample
of 41 icebergs. The depth of the base of the iceberg below the surface
was carefully measured for each and the sample mean and standard
deviation were calculated.
Part a)
Which of the following is/are parameter(s) of interest with respect to the new investigation here? (Select all that apply)
Part b) In testing a hypothesis about a parameter of interest, what would your null hypothesis be?
Part c) You would take the alternative hypothesis to be:
Part d) Suppose that, based on data collected, you reject the null hypothesis. Which of the following could you conclude?
Part e) Suppose that, based on data collected, you decide that the mean depth of Northern Hemisphere icebergs has increased due to global warming.
Part f) Suppose that, based on the data collected, you obtain a -value of 0.04. This means:
Part g)
Based on the -value that was obtained, you would (Select all that apply):
You can earn partial credit on this problem.