Which is the mоst cоmmоn form of gene expression regulаtion in eukаryotic cells?
Which schооl оf psychology proposed thаt we study psychology only through observаble behаvior?
Intrо. tо Stаts – Test 2 Shоw working 1. If P(A)=0.65, P(B)=0.1 аnd P(A or B)=0.3, find P(A аnd B). 2. Are the events in question 1 mutually exclusive ? Explain. 3. Maple has 7 Stats textbooks that she is going to place on a shelf. How many different arrangements of the books are possible if the order of the books on the shelf matters to Maple. 4. A university advertises to fill 2 positions for Statistics teachers. 24 people apply. In how many ways can the positions be filled ? 5. (a) Calculate 7P4 (b) Calculate 14C0 6. X 0 1 2 3 P(X) 0.7 0.05 ? 0.1 What does P(2) equal for this to be a probability distribution? 7. What is the expected value of the probability distribution in question 6. 8. a) For a binomial experiment, how many outcomes are possible for each trial ? b) In a binomial experiment, is it possible for the probability of success to change from one trial to the next ? 9. Consider a binomial experiment with n=10 trials where the probability of success on a single trial is p=0.4. Find Prob(r=7). 10. An unfair coin has prob(heads)=0.4. The coin is tossed. What is the prob. that the first tail occurs on the 7th toss ? ( Hint. Note that the word first is underlined ). 11. A gale force wind occurs on average once every 60 hours on a mountain road. For an interval of 300 hours, what is the prob. that 4 gale force winds are experienced ? ( Hint, use a Poisson distribution. ) 12. What is the mean and standard deviation of the Standard Normal distribution ? 13. What does a z-score represent ? 14. Consider a normal distribution with mean=20 and standard deviation=4 (a) Find a z value corresponding to an x value of 14 (b) Find the data value corresponding to a z value of 1.5 15. Find the area under the standard normal curve (a) To the right of z=1.52 (b) Between z=1.40 and z=2.03 16. If x has a normal distribution with mean=40 and standard deviation=15, find Prob ( 30