UH MyUH Services | All Campuses X Laulima : Home : Overview x |Laulima : Home : Membership x My Home X My Home *Midterm 3 Fall 2021 - ECON 32 x G (4) What is confidence interval x C D webassign.net/web/Student/Assignment-Responses/last?dep=28075575 7. DETAILS MY NOTES To calculate a confidence interval, you need (select all that apply): None O A standard error O A critical value O A point estimate DETAILS MY NOTES A random sample of n = 4 scores is obtained from a normal population with # = 20 and o = 4. What is the z-score associated with a sample mean x of 22? O 0.5 0 2 O -1 0 1 What is the probability of obtaining a sample mean x greater than 22? O 0.1587 O 0.3085 O 0.8413 O 1.00 9 DETAILS MY NOTES Ocean fishing for billfish is very popular in the Cozumel region of Mexico. In the Cozumel region about 53% of attempts resulted in a catch (of a single fish). Suppose that on a given day a fleet of fishing boats got a total of 25 attempts. a. (Round to 2 decimal places) What is the expected number of fish caught? b. (Round to 2 decimal places) What is the standard deviation of the number of fish caught? Optional: For partial credit, show your work by typing in the calculations used to obtain the numbers above