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A car enthusiast hypothesized that the average horsepower of 8 cylinder cars was less than 475. A random sample of 15 models of 2008 cars was selected and the horsepower measured for each car. The average horsepower was 440.6 with a standard deviation of 59.2 Estimate the p-value.
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
1. a random sample of 16 size aa batteries for toys yield a mean of 2.8 hours with standard deviation 1.3 hours.a find
The mean number of passengers per cruise is 1,820 and the standard deviation is 120.
A person must score in the upper 2% of the population on an IQ test to qualify for member ship in Mensa, the international high-IQ society. If IQ scores are normally distributes with a mean of 100 and a standard deviation of 15, what score must a ..
given two samples a and b with population size of a 30 sample variance of a 45.3 and a population size of b 25 sample
bentley foods inc. a large manufacturer of frozen foods has developed a new line of frozen pizza. management has agreed
a restaurant owner claims the percentage of his customer distribution is monday 10 tuesday 12 wednesday 10 thursday 15
a company is studying the number of monthly absences among its 125 employees. the following probability distribution
Conduct a global test of hypothesis to determine whether any of the regression coefficients are not zero. Use the .05 significance level
a group of 10 people begin a chain letter with each person sending the letter to four other people. each of these
To evaluate the effect of a treatment , a sample of n=9 is obtained from a population with a mean of m=40 and the treatment is administered to the individuals is found to be M-33
You only worry if there is at least a 50 or more percent chance that you have the disease. Suppose that test has same specificity = p For what value of p will you start to worry?
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