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If I had 6600 wigets, how many do I have to test with 0 failures to show 95% of them are acceptable with a 95% confidence?
On what method is the Excel based calculator that you have provided based on (Exact, Score, Wald, Adjusted Wald). Also, what method is the calculation in Minitab based on?
Students given exam with 300 multiple questions, distribution was normal and mean 195 with a standard deviation of 30. What were the scores of the students who are within one standard deviation of the
The grades on the midterm given in a large managerial stats class are normally distibuted with mean 75 and standard deviation 9. Instructors of this class wants to assign an A to top
How could we rescreen for defective units from a population of 900 units and establish a 95% confidence that the whole 900 units are acceptable.? How many would we need to check out of the 900?
The probability that Luis will pass his statistics test is 0.44. What is the probability that he will fail his statistics test?
Among the contestants in a competition are 35 women and 20 men. If 5 winners are randomly selected, what is the probability that they are all men?
How should I compute probability in spss for variable "seizure duration" with unnormal distribution which constitutes numerical data of duration in seconds.
If you record data for a year, and find that the mean number of women in shelters is 250, with a standard deviation of 75, and the distribution is normal, answer this. If the city's shelters have a ca
The cholesterol levels of a population have a normal distribution with a mean of 160 and a standard deviation of 30 how you I find the percentage of the population with cholesterol levels above 200.
Suppose that the scores of architects on a particular creativity test are normally distributed. What percentage of architects have Z scores? a. above .10; b. below .10
Calculate the z score for a raw score of 10 from the folowing scores:10,20,25,5,30. Based on your anser , approximately what percentile does the raw score of 10 represent?
IQ tests generally have scores in which the mean is 100, and the standard deviation is 16. If your IQ score was 134, what percentage of the population would have a higher IQ than you?
What is the actual formula for finding the exact probability from the z-score without having to use the table?
On a scale from 0 to 100, the mean level of economic development among the countries in the world is 65 and the standard deviation is 10. What proportion of countries in the world have economic develo
A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random sample of 130 of the school's students
I have two contingency tables. One has a chi-square value of 14.40 and the other is 27.86. Both have 6 degrees of freedom. Based on an alpha of .01 do you reject the null hypothesis?
Suppose that the scores of architects on a particular creativity test are normally distributed. What percentage of architects have Z scores?
For large correlations, the SAS program simply states that p < .0001. But to conduct a meta-analysis I need to know the exact p values for large correlations. Where is a table of r to p for various
Compute the mean and variance of the discrete probability distribution and determine the probabilities of the following events using the binomial formula.
Suppose a candidate running for sheriff claims that she will reduce the average of emergency response to less than 30 minutes. (30 minutes is thought to be the average response time with the current s
A director of a social agency is planning to hire temporaty staff to assist with intake. In making plans, the director needs to know whether there is any difference in the use of he agency at differen
Figure out the best means to calculate the reliabilty of our work load index ie a measure of work load per empolyee per hour - is there a statistical measurement i could use? i really need to verify t
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlatio
If I have unnormal data with n=15, and there are 2 samples. What test do I use? How do I make the data normal if the samples contain zero, b/c it's measuring time?