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A 95% Confidence Interval is generated. Which of the following would result in a confidence interval that was less wide (i.e. one with a smaller margin of error)? Answer
a. Increasing the sample size
b. Decreasing the sample size
c. Increasing the degree of confidence to 99%
d. We don't have enough information to determine the answer.
e. Both (b) and (c)
A random sample of 10 miniature Tootsie Rolls were taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were as follows:
First, write down three social problems (e.g., drug abuse, gang membership, bullying, domestic violence, child abuse, etc) that we might attempt to predict using logistical regression.
Assume you want to repeat the FDA experiment to achieve an estimation of the mean μ of the amount of caffeine content of a cup of coffee.
Very satisfied customers give the XYZ-Box video game system a rating that is at least 42. In the context of this situation, interpret making a Type I error; interpret making a Type II error.
Supposes that the diameter of bearings are independent normally distributed random variables with mean µB = 1.005cm and variance σ²B = (0.003)² cm² . The diameter of shafts are independent normally distributed random variables having mean µB = 0.9..
State the alternative hypothesis that would be used to determine if Brand A has a higher proportion of defective smoke detectors than Brand B. Calculate the test statistic for determining if a difference exists between the failure rates of the two..
The average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
a homogenous transition probability matrix is given below. find the steady state probabilities of state.states 1
Employees of a local company are classified according to gender and job type. The following table summarizes the number of people in each job category.
suppose the monthly income of assistant managers of our local banks are normally distributed with mean of php40000 and
Major hurricane will strike the U.S. mainland, b) at most one major hurricane will strike the U.S. mainland, and c) more than one major hurricane will strike the U.S. mainland.
Each vehicle had the gallon of gas added to the empty tank and then driven until empty. Number of miles travelled for all twelve readings are below. Use data to compute the mean and median mileages.
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