Number of results: 30,177
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
Question 1 Use the following research question and data for questions 1 - 6. A researcher is examining the effects of a computer-based training program designed to teach algebra. The researcher randomly selects subjects for two groups and gives one group the computer training ...
Saturday, October 18, 2008 at 4:35pm by J
Do you know how many college classes there are? Please type in your specific subject so that an expert in that subject can help you.
Monday, November 17, 2008 at 7:30pm by Ms. Sue
College students and Grads
We are presently in need of E-tutor volunteers at Jiskha. If you feel you have a need to help others, and enjoy helping students in grasping ideas in their schoolwork, we are looking for additional volunteers. Specifically, we need competent and helpful persons in Algebra ...
Sunday, January 18, 2009 at 8:40pm by bobpursley
college pre statistics
consider the following sample statistics from a population that is aproximatly normal. n=15, s= 7.92,level of confidence is 99 % Calculate the margin of error( round to the nearest hunderth)
Wednesday, March 11, 2009 at 5:11pm by Angela
The area under the curve indicates the probability. Use the Z-score to determine area. Z = (x - μ )/SD, where x = score, μ = mean, and SD = standard deviation. Use table in your statistics text called "areas under normal distribution" or the source indicated by ...
Sunday, March 22, 2009 at 2:09am by PsyDAG
Statistics - College
Dealing with binomials. P(Possible Prize) = 1/1000 n=52 P(winning)=P(x=1)= P(x=1)=52! (1!51!) (.(.001)1 (1-0.001)51 Is the answer 0.050949 OR 5.0949%?
Friday, May 29, 2009 at 9:44pm by Clara
Statistics - College
0.050949 and 5.0949% are equivalent A probability is expressed as a numerical value between 0 and 1
Friday, May 29, 2009 at 9:44pm by Reiny
Do students at various colleges differ in how sociable they are? Twenty-Five students were randomly selected from each of three colleges in a particular region and were asked to report on the amount of the time they spent socializing each day with other students. The results ...
Saturday, July 18, 2009 at 11:58am by Jerry
You want to compare the quality of several statistics textbooks. (a) Identify two categorical variables and two quantitative variables that you would use to describe textbook quality. Give a reason for each of your choices. So I think for the first categorical variable the ...
Wednesday, September 9, 2009 at 10:07pm by Samantha
college (statistics) - help requested
Statistics help needed. "college" is not a subject
Monday, December 21, 2009 at 10:21pm by drwls
suppose we have a set of blood pressure set with a mean of 120 systolic and a sample standard deviation of 20 points assume a normal distribution of what two values should 95% of all systolic bp lie
Tuesday, May 22, 2012 at 9:44pm by melba
find the range standard deviation and variance for following sample data 2,11,81,29,22,59,78,71,21,43,99,12,38,74,56,81
Tuesday, May 22, 2012 at 9:47pm by melba
SATI SCORES AROUND THE NATION HAVE A MEAN SCORE AROUND 500 A STANDARD DEVIATION OF ABOUT 100 POINTS AND ARE APPROXIMATELY NORMALLY DISTRIBUTED A PERSON WHO SCORES A PERFECT SCORE OF 800 ON THE SAT I HAS APPROXIMATELY WHAT PERCENTILE RANK WITHIN THE POPULATION
Tuesday, May 22, 2012 at 9:50pm by melba
An insurance company checks police records (in a city) on 500 accidents selected at random and notes that teenagers were at the wheel in 120 of them. It is desired to test if this information indicate that more than 20% of auto accidents involve teenage drivers in the city. ...
Wednesday, May 23, 2012 at 9:32pm by Hannah
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance Range = highest score - ...
Tuesday, May 22, 2012 at 9:47pm by PsyDAG
First, please do not use all capitals. Online it is like SHOUTING. Not only is it rude, but it is harder to understand. Thank you. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion...
Tuesday, May 22, 2012 at 9:50pm by PsyDAG
95% = mean ± 1.96 SD
Tuesday, May 22, 2012 at 9:44pm by PsyDAG
You can try a proportional one-sample z-test for this one since this problem is using proportions. Using a formula for a proportional one-sample z-test with your data included, we have: z = .24 - .20 -->test value (120/500 is .24) minus population value (.20) divided by ...
Wednesday, May 23, 2012 at 9:32pm by MathGuru
Suppose the distribution of player heights can be considered symmetric and mound-shaped with mean 72.5 inches and standard deviation 1.2 inches. Use the 68-95-99.7 rule to answer the following questions.
Tuesday, May 22, 2012 at 9:44pm by Anonymous