A study was done to see if students who took AP Calculus be…
A study was done to see if students who took AP Calculus before taking the AP statistics course did better than students who did not take AP Calculus. They wanted to see if there was a difference in the AP Statistics exam scores. The p-value was zero. What does this mean?
Read DetailsResearchers want to determine if there is a connection betwe…
Researchers want to determine if there is a connection between choice of musical instruments and gender. They want to see if the proportion of men (m) who play the flute is different from the proportion of women (f) who play the flute. They find that the p-value is 0.005. What can be said about the 99% confidence interval for the population mean difference?
Read DetailsIn 2014, the General Social Survey asked respondents if they…
In 2014, the General Social Survey asked respondents if they had completed a stress management program in the past 12 months. Out of a random selection of 151 Republicans (group 1), 21 said yes. Out of 83 Independents (group 2), 16 said yes. Suppose that a significance test for Ho:p1-p2=0 versus Ha:p1-p2 does not equal 0 was computed. What would be the pooled proportion?
Read DetailsA fellow student says that the average salary of graduates i…
A fellow student says that the average salary of graduates in your major is 30,000 dollars per year. You don’t think that this is correct. You think that the average salary is different from this. To show that your fellow student is wrong, you take a simple random sample of fifty graduates who have graduated in the past 5 years and ask for the amount of their starting salary. We want to investigate whether there is evidence to support your claim that the population mean starting salary is different from 30,000 and find that the p-value is 0.07. What can be said about the 95% confidence interval for the population mean difference?
Read DetailsIn 2014, the General Social survey was interested in studyin…
In 2014, the General Social survey was interested in studying individuals volunteering habits.They randomly selected 580 men and 689 women and then asked them if they had volunteered in the last month. Out of 580 men, 34 said that they had volunteered in the past month and out of 689 women, 37 said that they had volunteered in the past month. Suppose that you want to make a 95% confidence interval for , what assumption is violated in this case?
Read DetailsA study was done to see if students who took AP Calculus be…
A study was done to see if students who took AP Calculus before taking the AP statistics course did better than students who did not take AP Calculus. They wanted to see if there was a difference in the AP Statistics exam scores. The p-value was zero. What does this mean?
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