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The iq test score are normally distributed with a mean of 100 and a standard deviation of 15. Determine the probability that the person would score 130 or more on the test?
Suppose that you select a sample of 100 U.S. hospital patients. The probability is 90% that the sample percentage will be within what symmetrical limits of the population?
Ace Jack had no idea whether the $100,000 he pays for training for his used car salespeople works.
The following sample data shows the quarterly earnings in millions for two US companies. Your research interest is finding if the average earnings for these companies are different.
An LU professor is interested in whether there is a difference between undergraduate students and graduate students in the amount of time spent praying each day.
An investigator wants to estimate caffeine consumption in high school students. How many students would be required to ensure that 95% confidence interval estimate for the mean caffeine intake (measured in mg) is within 15 units of the true mean? ..
Which of given is the correct decision statement for test?
What do we mean by confidence intervals - provide an example that illustrates your answer. Suppose we were to apply 95% and 99% confidence to your study results.. how might your result differ and why?
List all samples of 3 and compute the mean of each sample. Compute the mean of the distribution of sample means and population mean. compare the two values
We measure the self esteem scores of a sample of statistics students, reasoning that this course may lower their self esteem relative to that of the typical college student (µ=55 and σ x =11.35) We obtain these scores:
Determine the critical path and project completion time.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Calculate the mean and standard deviation of the sample mean based on data from 100 stores.
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