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Q1: A system consists of five identical components connected in parallel. Determine the reliability of the components such that the system reliabilty is 97%.
Conceptually we would expect the probability of newborn males and females to be the same. However, census reports indicate that the ratios of males and females in various countries do not conform to the theoretical prediction.
To estimate the true proportion of students who abstain from alcohol at LBCC, you will need to take a simple random sample.
Calculate (a) MAD, (b) MSE, and (c) MAPE for the following forecast versus actual sales figures.
A certain random experiment can result in one of four different possible outcomes, which we'll call A, B, C and D.
As of 2012, the proportion of students who use a MacBook as their primary computer is 0.36. You believe that at your university the proportion is actually greater than 0.36. If you conduct a hypothesis test, what will the null and alternative hypo..
Explain how the Central Limit Theorem can help you convince your boss that while you can't get rid of sampling error the results from your statistical work (that is based on sampling) can still be useful.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
Define the standard error of the mean. What happens to the standard error as the sample size increases? Explain
Using a random sample of 100 workers, researchers calculate a 95% confidence interval for the average hourly wage earned by construction workers in the city of Boston. This interval they calculate is from $18 to $26.
State the null and the alternative hypotheses. Using the p-value approach, test to determine whether or not the mean age of all employees is significantly more than 40 years.
The average number of typos on one page of a manuscript is 8. What is the probability that 4 to 6 type appear on 2 pages of the manuscript? Imagine Poisson distribution.
Determine Probability values based on discrete distribution.You roll a fair die three times.
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