Lake ecosystems A. Based on the shape of these lakes and th…

Lake ecosystems A. Based on the shape of these lakes and their depth, which of them was most likely formed by glacial processes, which was formed by human activities, and which was formed by dissolution processes?  B. Which of these lakes has the greatest shoreline development? Which probably has the lowest water residence time?  C. What lake habitat zone is the white arrow pointing to in lake A?  D. You swim to the middle of lake B. When you reach the middle, what habitat zone are you in while you are near the water’s surface?  E. In the same location, you dive down deep into the lake where there is very little light. What habitat zone are you in now? 

True-False A type I error has been committed when the null…

True-False A type I error has been committed when the null hypothesis is false and there is a failure to reject it. A Type II error occurs whenever the test statistic does not fall in the critical region when the null hypothesis is actually false. If the sample size is increased when performing the z test for a mean, then for a fixed level of significance, the probability of committing a Type II error will be reduced.

An energy official claims that the oil output in the U.S. ha…

An energy official claims that the oil output in the U.S. has climbed from the 2014 level of 8.6 million barrels per day.  He randomly selects samples 50 wells throughout the U.S. and determines the mean output to be 9.2 million barrels per day with the standard deviation of 1.3 million barrels.  Test the researcher’s claim using the P-value approach at a 5% level of significance.