Stats Help for College-level Students

probability

Problem: Chances of recieving a direct hit by a scud missile. A scud carries 113kg of explosive, has blast are of 91m in diameter and that missiles are being lobbed into an area 80km long and 48km wide. Assume that missiles fall randomly on this area. a) What is the probability of being in the blast area of a missile? b) ...continues

Test preparation problems

1. A random variable X has the following cumulative distribution function F(x) = { 1 - e^(-(x+1)) -1 ...continues

normal distribution

I was wondering if someone could help explain the Normal Distribution to me, maybe in more simple terms. An example would also be useful...I am using the program Minitab to generate my answers to questions.

normal distribution

A very large number of fish are swimming in a lake. Their weights are normally distributed with mean 1.30kg and a standard deviation 0.40kg. Fish caught with weights less than 0.5kg have to be thrown back. a) If an angler catches a randomly selected fish, what is the probability that the fish has to be thrown back? b) find ...continues

anova and confidence intervals

using the confidence intervals: 95% determine which groups differ in average shelf life. A B C D 94 88 76 82 100 89 69 80 90 88 76 82 97 83 79 78 101 79 80 89 90 82 72 80 give test statistic, hypothesis, decision ...continues

Experimental Design - ANOVA

I need assistance with setting up a one-way design analysis with step by step guidance. a. What is the response variable and what is the factor? b. How many levels of the factor are being studied? c. Is there any difference in the average amount of fluid the diaper can hold using the 3 different filler materials? Is so, whi ...continues

Regression Models

One of the assumptions for regression models is that the dependent variable must be at least interval scale data. Can you please explain why. And A local company wanted to predict the weekly sales based on the weekly newspaper advertising dollars. The model that result is: ŷ= -0.1 + 0.7x, where the dependent variable is ...continues

Re:Post 9815

Amrit, I really appreciated your detail explanation, is it possible to represent how the detail explanation would be displayed in a graph in your response, Why does one develop a line of regression? What kind of outcomes from the line of regression make sense or does it have to be on the line to be valid? But what does it mean ...continues

Inferences - one population

In a new advertising campaign, Coca-Cola pokes fun at the decision to revive its famous contoured bottle. Atlanta based Coke faced significant technical hurdles in bringing out the well-known bottle in a new material: plastic. Coke also conducted extensive marketing tests to make sure that one of the world's best known package ...continues

Comparing two populations

While it cannot be denied that advertising impacts sales, it is also true that advertising is expesive and companies want to advertise in ways that have the greatest benefit for the amount of money spent. A company that sells snack food designs two different advertising strategies, one focusing on print media and the other on r ...continues