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Homework Help for Statistics
Statistics is an area of Mathematics that uses large amounts of numerical data to make inferences based on probabilities.
- Academic integrity
(a) Suppose you start with one Red and one Black ball in a bag. You draw a ball at random from the bag repeatedly and look at its colour each time. After each successive draw, you double the number of Red balls and triple the number of Black balls in the bag before the next draw (eg. on the third draw there will be 4 Red and 9 Black balls in the bag). Explain why you will draw only finitely many Red balls in total with probability 1. [3 marks]
(b) In a modified game, suppose instead that for before the nth draw, you first make an n by n square arrangement of balls where the perimeter balls are all Red and any interior balls are Black ball. Thus, on the second draw there are 4 Red and 0 Black in the bag (22 in total), on the third draw there are 8 Red and 1 Black in the bag (32 in total), on the fourth there are 12 Red and 4 Black in the bag (42 in total), and so on. How many Red and Black balls will there be on the nth draw? Will you still draw only finitely many red balls? Explain your answer. [4 marks]
The coefficient of correlation conveys:
a. the size and direction of the relationship between two variables.
b. the unintended changes in a subject's behaviour due to the experimenter's cues.
c. whether or not the principle of falsifiability applies to each variable.
d. whether one variable causes the other variable to happen.
(1 point) A culture of yeast grows at a rate proportional to its size. If the initial population is 2000 cells and it doubles after 2 hours, answer the following questions.
1. Write an expression for the number of yeast cells after t hours.
Anser P (t) = ..............................
2. Find the number of yeast cells after 10 hours.
3. Find the rate at which the population of yeast cells is increasing at 10 hours.
Answer (in cells per hour):............................
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