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Given a sample size of 25, with sample mean 736.2 and sample standard deviation 82.3, we perform the following hypothesis test. Ho: μ = 750
H1: μ ≠ 750
What is the conclusion of the test at the level? Explain your answer.
A group of 3 students is to be selected from a group of 12 students to take part in a class in cell biology.
The process is monitored using a sample size of 20. Calculate the upper and lower control limits. Give your answers to 2 decimal places.
The weights of dormitory cockroaches follow a normal distribution. 14% of the dormitory cockroaches weigh below 77 grams and 10% of them weigh above 82 grams. Find the mean and standard deviation of their weights.
Construct a 90% confidence interval on the difference in fraction nonconforming between the two processes."
If one person is arbitarily selected from this sample, determine probability of getting someone who is age 18-22 or doesn't smoke.
To test whether the population mean is less than a specified value.
Which would be inappropriate, and why. Then identify what you think is the best measure of variability to use for your example and explain why you believe it to be better than the others.
Confidence interval for population average rating of the new HMO
Grindit & Floggit Ltd. make customized Widgets at a cost of $150 per unit of which 3% (on average) happen to be out of tolerance. Up to 115 Widgets can be produces in one continuous run whose set up incurs an additional cost of $10 000.
Digital camcorder repair service has set the goal not to exceed average of 5 working days from time unit is brought in to time repairs are completed. Compute the t-value.
Find out the crude death rate, age specific death rate, standard death rate and adjusted death rate.
Is this adage correct for baseball? Out of 2425 regular season games in 2002, the home team won 1314 of them. Does the home field advantage apply in baseball?
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