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Weights of a certain model of fully loaded gravel truck follow a normal distribution with mean 6.4 tons and standard deviation 0.3 ton. What is the probability that a fully loaded truck of this model is (a) less than 6 tons, (b) more than 7 tons, (c) between 6 and 7 tons?
Compare and contrast quantitative and qualitative research designs. Identify and discuss some advantages and disadvantages for each type of research.
A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 99% confident that her estimate is correct.
Project was estimated by using ADM/PERT analysis. Due to extensive length of project many activities were combined; Following is the result.
The sample yielded a mean content of 11.88 ounces, with a standard deviation of 0.24 ounces. Use a 0.05 level of significance and test to see if the machine is in perfect adjustment (perform all six steps of hypothesis testing, including p-values)..
Compute the kappa statistic and its standard error regarding reproducibility of the diagnosis of dyspnea in the clinic.
Utilizing Excel data analysis calculate t distribution also deduce the result. Study of variance is used to investigate if there is a difference in the mean mileage of the three cars.
he population consists of all 15 year olds living in the attendance district of a local high school. You plan to obtain a simple random sample of 200 such residents by using the roster of the high school as the sampling frame.
Provide an example and state the Null and the Alternative hypothesis for the examples in symbolic form.
Increasing the confidence-interval level from .95 to .99
What I need are relevant questions for a survey questionnaire that will be valid for testing each of 3 hypotheses. Include the variables tested.
If you use a 0.10 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting a null hypothesis that the population mean is 500 if you use the Z test?
Suppose four heads appeared face up on four tosses of a coin. what is the probability that a head will appear face up in the next toss of the coin?
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