Blog

A child with chronic benign neutropenia demonstrates an antibody in the serum directed at antigens on the patient’s neutrophils. This finding is consistent with the presence of:

What is the consequence of either severe neutropenia or neutrophil dysfunction?

Which specific cold agglutinin is present in 20% of patients with infectious mononucleosis?

Terminal deoxynucleotidyl transferase (TdT) is found in 90% of acute leukemia of which type?

A service station consists of two back-to-back stations S1 and S2. Customers follow this workflow: Customers first arrive at S1​, are served, and then proceed to S2​. After service at S2​, with probability 0.1, a customer is sent back to S1​ for rework (reentrant flow). Otherwise, with probability 0.9, the customer leaves the system. Assume the following conditions: The arrival process follows a Poisson distribution with rate 10 per hour. The service times at S1 and S2​ follow exponential distributions with means 5 minutes and 6 minutes​, respectively. S1 has a single server and S2 has two servers. Both have infinite queue capacity.

What is the distribution of the interarrival time of Type A customers? Specify the distribution and its mean in minutes. Distribution: [dist] Mean: [mean]

Find the marginal distribution of X: P(X=0) = [p0] P(X=1) = [p1] P(X=2) = [p2]  

Complete the following roadmap matrix R of X(t): R =  [r00] [r01] [r02] [r10] [r11] [r12] [r20] [r21] [r22]

Are X and Y independent? Choose your answer below and state the reason on the scratch paper.

Customers arrive at a service desk according to a Poisson process with rate