Number of results: 15,355
Please Help! My book and instructor are no help. Please help me understand why I need to make a scatter diagram, when dealing with bivariate data, and how to find SS(x), SS(y), SS(xy), and r. I have all the formulas, but don't understand. Thanks! I dont know that the diagram ...
Tuesday, August 30, 2005 at 9:45pm by Rebecca
I'm looking for some help with my statistics homework...I'm good with the basics, but I really bombed on my last class anyone??? To help you, we need to know specifically what problems you have. Please repost with specific problems. I hope this helps a little. Thanks for asking.
Thursday, July 13, 2006 at 9:59am by Robert
Let X1;X2;X3;...;X6 be a random sample from a distribution with the following probability desity function: Fx(x) = (1+4x)/3 for 0<x<1 = 0 for x=<0; x>=1. (a) Determine the joint p.d.f of Y1 and Y6 where Y1<Y2<...Y6 are the order statistics. (b) Let R= Y6-Y1 ...
Thursday, August 10, 2006 at 2:18am by ruth
Please help me figure them out. 1. In the 105th Congress, the Senate consist of 55 Republicans and 45 Democrats. If a committee is formed by randomly selecting four different senators, what is the probability that they're all Republicans? 2. It's common for public opion polls ...
Tuesday, December 5, 2006 at 3:45pm by David
Assume that the cure rate for a certain drug is 20% and that 15 patients are tested with this drug. Find the following: a) Mean b) Standard Deviation c) P (exactly 4 cures) d) P (exactly 4 cures) A snack company distributes chips in bags labeled 6 ounces. The local Bureau of ...
Monday, December 11, 2006 at 5:12pm by Mary
i have to find definitions and describe 208 words in my statistics class and for one of them it says: describe the deviation from a pattern of a graph. i don't actually get what it's asking me. i don't think it's pattern becuase i already have the definition for that. when it ...
Friday, January 26, 2007 at 10:16pm by david
Could anyone explaint to me what role the Binomial Theory plays in statistics and probability? Using statistics, we can make statements about a population based on sample data. Probability helps us make those statements. The binomial theory can be used to determine ...
Tuesday, March 6, 2007 at 10:11pm by Jennie
Using the following information find a 95% confidence interval for the intercept in the regression of measured distance on recession velocity. VARIABLE COEFFICIENT STANDARD ERROR Constant 0.3391 0.1185 Velocity 0.001373 0.000227 T-STAT P-VALUE 3.369 0.0028 6.036 0.0000045 Est...
Wednesday, March 14, 2007 at 8:18pm by MMK
Statistics. The lowest temperature ever recorded in the state of Oregon was -54 F ( in Seneca, on February 10, 1933). The state’s record high temperature occurred in Pendleton on August 10, 1898, when it reached 119 F. What is the historical temperature range in the state of ...
Wednesday, March 21, 2007 at 8:59pm by carol
Hi! I've been stuck on this question for a while. I know that I have to do some sort of 1-1/k^2 for empirical rule, correct? I can't figure out how to calculate any of this and what it means of within the standard deviation. I would greatly appreciate any help on this - thank ...
Monday, June 11, 2007 at 1:19am by Maggie
Hello, I have a few questions I'm working on for Statistics hw. Here's one of them - please help me, I'm stuck. It is known that 2% of the population has a general injection allergy. Suppose the Health Dept. randomly selected 250 individuals from the population and there were ...
Monday, June 25, 2007 at 4:18pm by Maggie
My question is in statistics under what circumstances would the mode be an appropriate measure of central tendency? Whenever you expect a "normal" Gaussian distribution and have a large number of measurements. In that case the "mode" or most frequently obtained value should ...
Monday, July 9, 2007 at 5:20pm by student
Is there a website where i can find the information you provided further because i am still not understanding towards what you mean.....thanks i'll appreciated it... My question is in statistics under what circumstances would the mode be an appropriate measure of central ...
Tuesday, July 10, 2007 at 10:57am by student
A random sample of 14 college female students revealed their average height was 66.1 inches. a) How many students should be in a samle if a 95% confidence interval is to have a margin of error of only plus/minus 1 inch? Is that the only information you were given? Were you not...
Monday, July 30, 2007 at 5:01pm by Kasey
Davey wonders what proportion of the students at his school is satisfied with the quality of meals provided by the cafeteria. He interviews an SRS of 50 of the 750 students living in the dormitory. Thirty-eight of them are not satisfied with the quality of meals. a) Describe ...
Wednesday, August 1, 2007 at 4:45pm by Kasey
Why would one not be surprised that when students were asked how many minutes they studied on a typical weeknight, most responses are in multiples of ten minutes???? This question seems to be more about psychology than statistics. Most people don't recall study time intervals ...
Saturday, August 4, 2007 at 1:56am by Kayse
If Z is a standard normal variable, find the probability that Z lies between -1.10 and -0.36 Use the table of the area under the normal distribution in the back of your statistics textbook to find the area between these Z values and the mean. Since they are both on the ...
Sunday, August 5, 2007 at 9:47am by john
Statistics:Z and T Statistics: Confidence Interva
Z and T Statistics: Confidence Intervals and Significance Tests: A friend who hears that you are taking a statistics course asks for help with a specific chemistry lab report. She has made four independent measurements of the specific gravity of a compound. The results are : 4...
Tuesday, September 11, 2007 at 4:26pm by Carma
what are the variables of statistics according to functional relatipnships?
Wednesday, June 25, 2008 at 5:07am by rhea
a little bit rusty on statistics, i generally know how to set up the problems but not how to solve. thanks for any help you can give, especially with the integration bounds I'm confused with. X & Y have a joint distribution, and the following is the joint density fnct: f(x,y...
Monday, September 17, 2007 at 6:02pm by Kay