Blog

Consider the data on wafers classified by contamination and location in the table below.   Number of Contamination Particles Center Edge Totals 0 0.28 0.12 0.40 1 0.17 0.03 0.20 2 0.1 0.05 0.15 3 0.06 0.04 0.10 4 0.04 0.01 0.05 5 or more 0.07 0.03 0.10 Totals 0.72 0.28 1   Assume that one wafer is selected at random from this set. Let A denote the event that a wafer contains four or more particles, and let B denote the event that a wafer is from the center of the sputtering tool. Determine P(B|A) 

An bag contains 15 marbles of which 10 are red and 5 are white. 5 marbles are selected from the bag. How many samples (of size 5) have at most 2 red marbles?

Consider the following circuits of 4 identical relays. The probability that any relay works is 0.7 and the failures of the relays are independent. What is the probability that, when current is applied, it flows from point 1 to 2?    

A game at a carnival involves rolling a fair six-sided die. The payouts are as follows: If you roll a 6, you win $10. If you roll a 4 or 5, you win $5. If you roll a 1, 2, or 3, you win nothing ($0$). What is the expected payout per roll (i.e. Find the expected value) ?

Where would you most likely find chromatin in the beads on a string conformation?

What is the polarity of the strand of DNA on the right?

How many different classes of histone proteins are there?  

True/False: “Carbohydrate loading” is a myth and is ineffective in all levels of athletes.

What is the main purpose of shoulder pads in football?

What are the only two symptoms that differentiate between Exertional Heat Stroke and Exertional Heat Exhaustion?