As part of a pre-launch security review, Northfield Retail’s own username/password authentication and session-management system — built in house two years ago — comes under scrutiny. The lead engineer checks the existing design against NIST 800-63-B’s digital-identity guidelines rather than guessing at password and session rules, and notes that a managed identity service such as Auth0 would also have been an acceptable choice when the system was first built. True or False: this is a reasonable way to handle digital identity securely.

Find z for the formula  z = x-xs  when x = 4.156, x= 2.534 and s= 4.128   Round to three decimal places

Find the mean and and median of the following numbers:  10, 11, 13, 14, 14, 17, 18, 20, 21, 25, 28Mean =Median =

The heights of giraffes follow a bell shaped distributed with a mean of  65.2 inches and a standard deviation of 1.4 inches.  The heights of elephants are bell shaped with a mean of 69.1 inches tall with a standard deviation of 1.2 inches.  Answer the following and round your answers to 2 decimal places. a.  What is the z-score for the height of a giraffe who is 67 inches tall? [answer1] b.  What is the z-score for the height of an elephant who is 68 inches tall? [answer2]

List the groups/interested parties in the Infamous Deal in DC and their motivations for the deal.

You can upload any work or scratch paper here, please make sure your scratch is labeled by question, if I cannot identify which problem the work is for I will not use the scratch.  It is best if you use a scanning app, I recommend you use  Genius Scan or Camscanner and note you can also upload your scratch in the exam module under Exam 1 scratch upload.  If none of that works you can email me your scratch paper within 10 minutes of the exam ending as well.

If we have a list of all the students at SMC and we randomly pick a starting point and then pick every 57th person on the list, what type of sampling is this?

A study in which the researcher knows which subjects got a treatment but the subjects do not know who got the treatment is called a blind, double blind or placebo effect?

The weight of a human heart is adults males has a bell-shaped distribution with a mean of 300 grams and a standard deviation of 35 grams.  Use the empirical rule to determine the following.  Write your answers in full sentences and use the appropriate units. a.   About 68% of adult male human hearts will weigh between what weights?  b.   What percentage of human hearts weigh less than 230 grams? c. What percentage of human hearts weigh between 230 grams and 405 grams?  

If we divide Santa Monica into 100 different neighborhoods and then randomly pick 15 of the neighborhoods and interview ALL of the people in those 15 neighborhoods, what type of sampling is this?