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A study found that the average time it took a person to find a new job was 3.5 months. If a sample of 30 job seekers was surveyed, find the 90% confidence interval of the mean. Assume the standard deviation of the sample is 0.5 month.
binomial distribution a large firm allows a discount on any invoice that is paid within 90 days. of all invoices 10
The historical reports from two major networks showed that the mean number of commercials aired during prime time was equal for both networks last year.
results from previous studies showed 79 of all high school seniors from a certain city plan to attend college after
each computer chip made in a certain plant will independently be defective with probability .25. if a sample of 1000
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states.
What is the probability that the person will be the last to leave the bank assuming no other customers arrive? Explain your answer fully.
use multiple regression to find the line of best fit through the following data. what does this tell
in linear regression the dependent variable must be
if a asteroids are entering the earths atmosphere and disintegrate with a rate that reduces their size by a factor on
The lifetime of automobile tires of a certain brand are found to follow an exponential distribution with mean 30 (in thousands of miles). Find the probability that one of these tires will last
You are the incoming inspector for potato chips - you are to ensure that each bag has 16 ounces or more in it. You want your testing to be at the level of significance of 0.05.
Find the confidence interval for the difference of the two means - Is there a significant difference in teacher's salaries between two states
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