We are currently in the midst of a global pandemic. Are there any goods or services that may switch from “normal” to “inferior” or vice versa during this health crisis? Do you think any such changes will be permanent?

* not services like health insurance or park admissions perferbably some goods

Find the 80% confidence interval for the standard deviation of the ages of seniors at Oak Park College if a random sample of 21 students has a standard deviation of 2.3 years. Assume the variable is normally distributed.

a.) (1.9,2.9)

b.) (2.6, 3.3)

c.) (3.7,8.5)

d.) (2.6, 7.0)

Are these amusement park rides equal in terms of monetary revenue?
Test at α = .01 significance level.

Tornado:                     Average daily revenue = $300.00;   standard deviation = 45.0;    n = 12

Double Blizzard:          Average daily revenue = $320.00;   standard deviation = 38.0;    n = 17

Deductible expenses for a service member’s moving do not include:

a. the cost of transporting household goods

b. Hotel Cost while moving to the new locations

c. Meals Incurred during the move

d. storage of household goods for a limited time upon arrival at the new location

Imagine that you work in the human resource department at Marriott’s corporate headquarters. Your team is thinking about ways it might use My Marriott Hotel game as part of the selection process. How could you use it? How would you measure its effectiveness?

Use PHP, javascript and a little bit of Html

More focus on php

Create a logout page (for patients) in hotel management.

Please provide the screenshot of the output too (logout page).

Hint: the logout page should include like this thanks for visting etcetera.

Thanks in advance

4. Consider the random variable Z from problem 1, and the random variable X from problem 2.

Also let f(X,Z)represent the joint probability distribution of X and Z.  f is defined as follows:

f(1,-2) = 1/6
f(2,-2) = 2/15
f(3,-2) = 0
f(4,-2) = 0
f(5,-2) = 0
f(6,-2) = 0
f(1,3) = 0
f(2,3) = 1/30
f(3,3) = 1/6
f(4,3) = 0
f(5,3) = 0
f(6,3) = 0
f(1,5) = 0
f(2,5) = 0
f(3,5) = 0
f(4,5) = 1/6
f(5,5) = 1/6
f(6,5) = 1/6

Compute the covariance of X and Z.

Then, compute the correlation coefficient of X and Z. (Note: You will need values that you computed in problems 1 and 2.)

These are questions 1 and 2.

1. Let Z be a random variable with the following probability distribution f:

f(-2) = 0.3
f(3) = 0.2
f(5) = 0.5

Compute the E(Z), Var(Z) and the standard deviation of Z.

2. Tossing a fair die is an experiment that can result in any integer number from 1 to 6 with equal probabilities. Let X be the number of dots on the top face of a die. Compute E(X) and Var(X).