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A doctor wants to estimate the HDL cholesterol of all 20-to 29- year-old females. How many sunjects are needed to estimate the HDL cholesterol within 3 point with 99% confidence assumming ?=18.6?
Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size required?
A 99% confidences level level requires ___subjects.
(Round up to the nearest whole number as needed.)
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
Douglas Boats is considering the possibility of expanding the warehouse for the WM-4 motors. How much should Douglas Boats expand, and how much would it be worth for the company to make the expansion? Assume demand is constant throughout the year.
suppose that x1 x2 x3 x4 and x5 is a random sample from a distribution with density function fx 1theta for 0ltxlttheta.
Service A delivers the document with probability 0.9, Service B with probability 0.9 and Service C with probability 0.8. What is the probability that at least one copy of the document will be delivered on time?
Using the 0.01 significance level, can we conclude that there is a positive correlation between the variables?
Assume that the population is 0.55. Compute the standard error of the sample proportion for the following sample sizes:
The random variable x is known to be uniformly distributed between 1.0 and 1.5.
The same is true for only 60 of 300 female Engineering majors. Find a 90% confidence interval for the difference in proportions of men and women Engineering majors who got such jobs?
Ten thousand fireflies are unable to produce light due to a genetic mutation. express the null hypothesis and the alternative hypothesis in symbolic form.
The analysis of variances produces df between = 3 and df within = 24. For this analysis, determine df total ?
question 1. select any two qualitative data of your survey. from your qualitative data carry out at least two
1. the instructor in a humanities class says that students have a 15 probability of making an a in her class 20
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