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Samples of size 2 will be drawn at random from a population with µ=2.5 and 963; =1.118.
Calculate the mean and the standard error of the sampling distribution of the sample means. Also, find the mean and standard error of the sampling distribution for samples of size 5.
What happens to the standard error as the sample size increases?
A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 30.
Compute and interpret each of the statistics in parts(a) through (f) Mean and Median.
What is the probability that the drug will be effective for 2 hours or less?
The article should include a margin of error and confidence interval. Discuss the subject matter in the article, and interpret the results and what the confidence interval and margin of error mean as they apply to the specific subject matter.
Determine x-bar and s for this data set. You may suppose the values for bulb life are normally distributed. Use traditional method to make your decision.
In textile industry, a manufacturer is interested in the number of blemishes or flaws occurring in each 100 feet of material. Of the following probability distributions, the one that most applies to this situation is the.
For a binomial probability experiment, with n=150 and p=.2, it is appropriate to use the normal approximation to the binomial distribution.
Using 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
Suppose we compare two population means, μ 1 - μ 2 . In each case, indicate how μ 1 relates to μ 2 :
At 95% confidence using the p- value approach, test the hypotheses. Let α = 0.1.
Illustrate what can we say about the probability distribution. Is it approximately normal, elucidate the mean and standard deviation.
We are asked to test for independence between age (i.e., adult and teen) and drink preferences.
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