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From a group of 7 paintings 3 are water colors and 4 are oils. In how many ways can you hang 3 paintings along a wall if the first and third must be water colors but the second one must be an oil painting?
use the given information to find the minimum sample size required to estimate an unknown population mean micro.margin
A survey of licensed drivers inquired about running red lights. One question asked, "Of every ten motorists who run a red light, about how many do you think will be caught?"
Calculate the z-test statistic to test the difference in SAT math scores from students in Delaware and New jersey. A sample of 45 students from Delaware had an average score.
question 1 the mean starting salary for college stats major graduates in spring of 2011 was 65000. assuming a normal
Assume the population standard deviations are not the same. At the .05 significance level, is there a difference in the mean waiting time?
30% of households say they would feel secure if they had $50,000 in savings. you randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. find the probability that the number that say they would feel secu..
You are asked to estimate the chance that the sum will be positive.
Use Excel and the data to test whether the mean alcohol expenditures for UCM students is equal to that of SBU students using a 1 % level of significance.
Do hotel managers on average vary significantly in femininity score from men in general?
If 8 patients participate in this study (so that n left arms and n left arms are measured), how many degrees of freedom should the researcher use in her t-test critical value?
Why is it important to study ethics in statistics? Have you seen statistics misused? Without naming specific companies or people, can you provide examples?
Evaluate the union's claim. Include the hypotheses (both null and alternate), alpha, test statistic (highlight where it is calculated on your spreadsheet), decision, conclusion.
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