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In a 0ne-tail test (l side) with z score of 1.645, what are the percentages for critical value and non-critical value?
Suppose that in NY State, 35% of voters are Democrats, 30% are Republicans, and 11% are independent. You are conducting a poll by randomly calling registered voters. In your first four calls, what is
Why can you not have a z- score equaling 0/0 ? what is problematic with calcutlating a z-score for a data set of repeated entries?
How to convert a exam score (standard score) back to Percent score? e.g. Total of students 16,
The library is to be given 3 books as a gift. The books will be selected from a list of 18 titles. If each book selected must have a different title, how many possible selections are there?
Apply the problem discovery sample size formula to several finite populations. How should I integrate the finite population correction factor (FPC) into this formula?
When would you use a hypothesis test for the difference in two population proportions at your place of employment, in your education, or in politics?
A sample of PVC pipes coming off a production line were tested for pipe diameter size. The statistical results (in millimeters) were:
200 people were sampled and the following table shows the number of people with a certain average electric energy usage based upon the type of home an individual lives
Time/CNN voter polls monitored public opinion for the presidential candidates during the 2000 presidential election campaign. One Time/CNN poll conducted by Yankelovich Partners, Inc., used a sample o
Why should you use ANOVA instead of several t tests to evaluate mean differences when an experiment consists of three or more treatment conditions?
Various temperature measurements are recorded at different times for a particular city. The mean of 25C is obtained for 60 temperatures on 60 different days. Assuming that pop st/deviation is 1.5C, te
When calculating confidence interval estimates...how is the x and standard deviation calculated? How to calculate one sided 95% confidence limits for a proportion.could you provide a formula ?
A parameter is a population characteristic. The numerical value of a parameter usually cannot be determined because we cannot measure all units in the population. We have to estimate the parameter usi
If I have a set of values(direct measurements of dynamic deformations of a road at 100m) between 3 and~1000, how can I calculate the 2 characteristical values wich limits the interval including 85,95%
With a z score of 1.5, what percentage often scores are above 52 and what percentage of the scores are above 60?
How large a sample should be taken if the desired margin of error is as shown below (0 decimals)?
I am charged with sampling expense report submissions for accuracy. We get 8000 T&E claims, and want to sample a subset making inferences about the population. I can probably get a good estimate o
How would figure out a 90% and 95% confidence interval for the below informaion? What would be the formula? Can I figure this out in Excel or Megastat? How would I do that?
State the main points of the Central Limit Theorem for a mean. B. Why is population shape of concern when estimating a mean? What does sample size have to do with it?
The tolerance of the automatic filling machine, leads to weights of bags being approximately Normally distributed with standard deviation 5g.
In 1992, the FAA conducted 86,991 pre-employment drug tests on job applicants who were to be engaged in safety and security relatd jobs and found that 1,143
Explain how you use data or summaries of data every day-or how data or summari es of data are used on you. Give examples that are different from those provided in the link above,
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
What events occurred in these months that may have caused such an extreme performance in the stock's return and describe and analyze the monthly returns using Stata's statistical and graphics capabili