Phukitol is a new anxiety medication undergoing clinical trials.  The study is a double-blind random controlled trial (RCT), the gold standard for drug trials.  The participants were divided into a Treatment Group which received Phukitol and a Control Group which received a placebo (sugar pill).  Neither the doctors nor the patients knew which group they were in during the trial (the meaning of double blind).    The trial is now complete and the results have been “unblinded”.  The average anxiety level of each individual has been plotted against the side effects that were observed for that individual for all participants. Yellow squares represent individuals that were in the control group, and purple circles represent individuals that were in the treatment group.    The paperwork on the participant represented by the red question mark was lost, so we need to figure out which group she was in.  Perform a nearest neighbor analysis and kth-nearest-neighbor analysis for k=3, and k=6 to make predictions as to which group the mystery patient was in.   

Select the the correct order of the step-by-step sorting of the following list using selection sort. 4 6 8 2 1 9 7 3 5

It takes 0.75 seconds to sort a list of 100,000 items using selection sort. Estimate the time to do the same sort on 200,000 items

Using the “same as earlier trick”, reconstruct this string (ignore dashes): QRSTUV-b2c6

Using the encoding chart shown below for a (7, 4) Hamming code, you get the message 0001010.  How should you interpret this message?  In other words, what 4-digit value is the sender trying to communicate?  

Give the checksum we would get using the last digit of sum checksum for the message   97420

In the neural network below, inputs to the system are shown in the boxes and ovals are neurons labeled with their thresholds. Give the value of Y1 and Y2.   Assume each neuron uses a simple comparison of inputs to the threshold and outputs only a 0 or 1      

What “trick” is used to detect errors in transmission of the following message?  MMMYYY   NNNAAAMMMEEE   IIISSS   JJJAAAMMMIIIEEE!!!

Match each sample of code to the level of language in which it is composed.

What is the output of the println() calls below:                              String s1 = new String(“abc”);                       String s2 = new String(“abc”);                       String s3 = new String(“abc”).intern();                       String s4 = new String(“abc”).intern();                       String s5 = “abc”;                       String s6 = “abc”;                                             System.out.println(s1 == s2);                        System.out.println(s1 == s3);                        System.out.println(s1 == s5);                        System.out.println(s3 == s4);                        System.out.println(s3 == s5);                        System.out.println(s5 == s6);