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1. Explain the difference between a left-tailed, two-tailed, and right-tailed test. When would we choose a two-tailed test? How can we tell the direction of the test by looking at a pair of hypothesis? How can we tell which direction (or no direction) to make the hypothesis by looking at the problem statement (research question)?
2. Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population? With a failure to reject the null hypothesis, can we make a general statement about the population based on the sample findings?
Rachel's doctor suspects she is suffering from hypoglycaemia. The amount of glucose in the bloodstream varies and a person with hypoglycaemia has an average blood glucose level of less than 65 mg/dL.
A student must choose one of the subjects, art, geology, or psychology, as an elective. She is equally likely to choose art or psychology and twice as likely to choose geology.
Two semiconductor factories are being compared to see if there is a difference in the average defect rates of the chips they produce. In the first factory, 250 chips are sampled. In the second factory, 350 chips are sampled. The proportions of def..
What percentage of personal checking account customers carry average daily balances in excess of $800? What percentage of the banks customers carries average daily balances below of $200?
An element E has a constant failure rate λ and a reliability at time t of R(t)=p, if p=0.5 and 0.9, what is the effect on Rs(t), basic reliability, serial Mean Time Between Failure, hs(t), MTBFs if additional elements are added to the baseline sys..
The trail was repeated 54 times with 22 correct identifications and 32 wrong identification.
Based on the model N(1152,84) describing Angus steer weights, what are the cutoff values for.
A commuter travels many miles to work each morning. She has timed this trip 5 times throughout the last month. The time (in minutes) required to make this trip was 44, 39, 41, 35, and 41.
If a time series is stationary without a linear trend or the seasonal component, which of the following forecasting methods may be suitable.
Assume the single pineapple is selected at random from last year's crop. Determine the probability that it weighs more than 35 ounces?
What is correlation analysis? How can correlation analysis be used in a business decision or examples specifically related to strategy formulation and implementation?
FINRA is considering three alternatives for providing food services (breakfast and lunch) to its employees: creating a company owned food service and hiring its own staff, hiring an outside vendor to provide food services (outsourcing), or a combi..
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