Number of results: 21
I am doing a paper on the maritime ringlet butterfly. I've been through quite a bit of sites but I can't seem to get a hold of satistics on the estimation of how many maritime ringlet butterflies remain, or even any sort of stats at all. I also can't seem to understand what ...
Wednesday, September 10, 2008 at 5:24pm by garrick
A test is composed of six multiple choice questions where each question has 4 choices. If the answer choices for each question are equally likely, find the probability of answering more than 4 questions correctly.
Wednesday, October 20, 2010 at 10:44am by Anonymous
In North American, female adult heights are approximately normal with a mean of 65 inches and a standard deviation of 3.5 inches. a.) If one female is selected at Random, what is the probablility that shes has a height 70 inches or higher? b.) The heights of 50 females were ...
Sunday, November 14, 2010 at 5:13pm by Benjamin
a. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score. b. This is a distribution of means rather than raw scores. Z = (Sample mean- population mean)/SEm SEm...
Sunday, November 14, 2010 at 5:13pm by PsyDAG
The average time a student spends studying just prior to a test is 36 minutes with a standard deviation of 5 minutes. This distribution approximates a normal curve. Find the percent of students who study just prior to the test for. a) more than 40 minutes b) between 35 and 45 ...
Thursday, November 18, 2010 at 11:50pm by badel
Is this problem correct Answer: 0.90^5 = 0.6562
Tuesday, February 8, 2011 at 1:26pm by charles
No, it should be .59049
Tuesday, February 8, 2011 at 1:26pm by Alex
5. Give the standard deviation for the mean and median column. Compare these and be sure to identify which has the least variability? Standard deviation of Mean = 0.476169 Standard deviation of Median = 0.753937
Wednesday, October 5, 2011 at 2:21pm by Hope
The smaller SD has less variability.
Wednesday, October 5, 2011 at 2:21pm by PsyDAG
3.Give the mean for the mean column of the Worksheet. Is this estimate centered about the parameter of interest (the parameter of interest is the answer for the mean in question 2)? Mean 3.50 Standard deviation 1.317 4.Give the mean for the median column of the Worksheet. Is ...
Sunday, December 4, 2011 at 1:53pm by charlene
**I don't want the answer, I want to know how to set the problem up and the formula that I need to use. I am online with a tutor right now, and they can't help me. :-( The average price of a gallon of unleaded regular gasoline was reported to be $2.34 in northern Kentucky (The...
Sunday, February 12, 2012 at 11:35pm by Shannon
Z = (score-mean)/standard error of the mean (SEm) Scores = (mean-.03) and (mean+.03) SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z scores.
Sunday, February 12, 2012 at 11:35pm by PsyDAG
n=18,x=14,p=0.75 using binomial probablility
Monday, July 23, 2012 at 2:06pm by monica
Given X~Bin(n=18,p=0.75) and let C(n,r)=n!/(r!(n-r)!) P(X=14)=C(n,X)*p^X*(1-p)^(n-X) =(n!/X!(n-X)!)*p^X*(1-p)^(n-X)\ =(18!/(14!(4!)) * 0.75^14 * 0.25^4 =0.2 approx.
Monday, July 23, 2012 at 2:06pm by MathMate
Rank the following data in increasing order and find the position and value of the 65th percentile. Please show all of your work. 2 1 6 3 4 7 0 0 0 7 5 8
Monday, August 20, 2012 at 1:03pm by latoya
assume the probability that an electronic device will have a type 1 defect is 1% and the probability that it will have a type 2 defect is 2%. given that these two defects are not independent ,what is the probability that an item randomly selected has both a type 1 and type 2 ...
Wednesday, February 27, 2013 at 11:38pm by natalie
a set of integers consists of 2,3,5,7,11,12,x. if x is increased by 1 the median of the set stays unchanged. however, if x decreases by 1, the median of the set also decreases by 1. what is the value of x?
Monday, September 16, 2013 at 10:11pm by busi
How u get tht answer
Monday, September 16, 2013 at 10:11pm by Math
Probability and Satistics
Random Variables X and Y follow a joint distribution: f(x,y)=(6-x-y)/8 if 0<x<2, 2<y<4 and 0, else Find P(1<Y<3|X=1) I first got the marginal distribution for x and got (3-x)/4 (Integrated from 2 to 4)and then got the conditional dist and got (5-y)/4 and then...
Saturday, November 2, 2013 at 4:02pm by Katy
A company that produces detergents wants to estimate the mean amount of detergent in 64-ounce jugs at a 99% confidence level. The company knows that the standard deviation of the amounts of detergent in all such jugs is .20 ounce. How large a sample should the company select ...
Thursday, November 21, 2013 at 2:46pm by ----