Douglas Z.

2. You have designed an experiment to investigate the behavior of Himalayan hamsters. In this experiment, a hamster is shown five closed boxes. Two of these boxes contain treats while the others... more

The 5-factor model is a popular theory of personality, the 5 factors being Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism. The Agreeableness scores of a random sample of... more

There are n balls marked 1, 2, ..., n in a container. Drawing one ball at a time, record its number, then put it back. Repeat this r times. If X is the number of different balls drawn, what is the... more

How many ternary strings (consisting of 0, 1, -1) of length n are there with r steaks of repeated digits?

Let b be a binary string of length r with no adjacent 0s or 1s, e.g. b can be 01010 or 1010 but not 1001 or 0010. For n > r, perform the following operation on a binary string c of length n: if... more

I need help deciding a career field. Between Data Science and Data Egineering

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Show that the coefficient of xn in (1 + x + x2)n is 1 + [n(n-1)]/(1!)2 + [n(n-1)(n-2)(n-3)]/(2!)2 +...

Stats:Experts believe that social distancing can reduce transmission of COVID-19 by about 60%. If the total COVID-19 cases all over the world are 169605 till March 17, what is the probability that... more

The elasticity of demand for apples is 0.58.  a. Is the demand for apples elastic or inelastic? How do you know?b. If the price of apples increases by 30%, what effect on demand would you expect?... more

I have an employee who has missed work twice in eleven years. I'm wondering if there is a way to show the probability of a random error like this occuring. Im not sure what information I may still... more

Express the following equation, using Ω Ο or Θ notation2|x| ≤ | ((4x-5)(2x+5))/(3x^2+6) | ≤ 18|x|