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Question: How much education? The 2008 Statistical Abstract gives this distribution of education for a randomly chosen American over 25 years old:
(a) How do you know that this is a legitimate probability model?
(b) What is the probability that a randomly chosen person over age 25 has at least a high school education?
(c) What is the probability that a randomly chosen person over age 25 has at least a bachelor's degree?
if all cars in the usa ran with petrol blended with 20 bioethanol produced by enzymatic hydrolysis of cellulosic
We investigate if a period of time feels longer or shorter when people are bored compared to when they are not bored. Using independent samples, we obtain these estimates of the time period (in minutes):
Draw the density curve corresponding to each of the following random variables, and then shade the area corresponding to the desired probability. You do not need to compute the probability.
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
A product coming off an assembly line has been found to weigh on average 17 pounds, with a standard deviation of 1.8. Thirty samples are chosen at random.
describe and explain two alternatives to nhst. what do their proponents consider to be their
a survey was conducted to learn more abou clarkston university. one part of the survey asked respondentd to indicate
A compound found in crude oil consists of 93.71% C and 6.29% H by mass. The compound is 128 g/mol. What is the molecular formula?
The length of country and western songs is normally distributed and has a mean of of 170 seconds with a standard deviation of 49 seconds.
standard deviation of the heights of young men is about 2.8 inches. suppose (unknown to you) the mean height of all male students is 70 inches. you measure 25 students. what is the sampling distribution of their average height x bar?
On opening day one season, 10 major league baseball games were played and they lasted the following numbers of minutes. Find the sample variance.
a cement manufacturer claims that concrete prepared from his product has a relatively stable compressive strength and
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