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A population has a mean μ = 150 and a standard deviation σ = 25. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 100. Mean of sampling distribution:
Standard deviation of sampling distribution:
Assuming a normal distribution, What is the z-score associated with the second quartile? If we wish to have 95% confidence interval, what would be the value of the confidence coefficient?
Is there a significant difference in mean fetal heart rates by position? Run the test at a 5% level of significance.
using the data below construct a table that combines robbery and assault into one category labeled violent and theft
for the distribution in the following table what is the percentile rank for x
Critically discuss some examples of descriptive statistics? Why are they used in research? What is a confidence interval?
(a) Determine the step response when Gc(s) = 1, and calculate the settling time and steady state for a ramp input r(t) = t, t > 0. (b) Design a lag network using the root locus method so that the velocity constant is increased to 10. Determine the..
Make a point estimate of the population mean difference in endurance after taking the herbs. Make a 95% confidence interval estimate of the population mean difference.
suppose bolts are being manufactured using a process so that it is known that the length of the bolts follows a normal
What is the probability that the average annual income of a sample of 100 defense attorneys is more than $120,000?
In a large clinical trial of 500 patients treated with a new drug, 40 reported sideeffects how many patients would need to be sampled to estimate the desired proportion to within a margin of error of 1%, using 98% confidence?
Six industrial workers were chosen for a study of the effects of rest periods on production.- Perform an appropriate nonparametric statistical test on the results shown in the following table.
a normal distribution has a mean of 45 and an unknown standard deviation. which random variable value below could
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