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Let X~N(2,6) and Y~N(-3,2) and Z~N(0,1). All three random variables are independent of each other. Do the following.
a. What is the distribution of W=X+Y+Z? What are E(W) and Var(W)?
b. What is the distribution of Q=2Y?
c. What is the distribution of P=-2X+4?
d. Find a and b so that M=a+bX is distributed as a standard Normal Distribution?.
A crucial step is offering participants a food reward
Pharmaceutical companies perform tests to make sure the products they produce are safe. One test is to make sure that the drugs has 100% potency, so the mean is 100%. Let's say for a particular tablet product that the production process has a populat..
Null hypothesis, an Alternate hypothesis, your work to get a t or Z value, a critical value for the test, a Decision, and if asked, a Conclusion. In order to rule on a potential federal grant, a government official must confirm that the average incom..
Diane Brown is the mayor of a large city. Lately, she has become concerned about the possibility that large numbers of people who are drawing unemployment checks are secretly employed. Her assistants estimate that 40% of unemployment benefi..
The length of time between breakdowns of an essential piece of equipment is an important factor in deciding on the amount of auxiliary equipment needed to assure continuous service. A machine room foreman believes the time between breakdowns of a par..
If a Pie Chart were constructed for the weights of the salmon, what would be the measure of the central angle for the class weighing 200-249 grams?
An automobile manufacturer has problems with sticking accelerator pedals
What proportion of customers say that they will return and rate the restaurant's food as good?
You are expected to complete a project related to inferential statistics - show that the random variable X is exponential and compute the probability of the wait time when it is greater
In a positive relationship I know that if X increases y increases but if x decreases and y decreases is this also a positive relationship?
A more general exponential reliability model may be defined by R(t)=a^(-bt) where a>1, b>0 and a and b are parameters to be determined. Find the hazard rate function, and show how this model is equivalent to R(t)=e^-(lambda*t).
This study investigates whether there are differences in the outcomes of three different treatments for anxiety. The treatment conditions that are compared are treatment with medication, treatment with psychotherapy, and placebo (inactive pills). In ..
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