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Given that X‾ = 78, σ2 = 25, n = 10 and α = .05, test H0 : μ > 80, assuming observations are randomly sampled from a normal distribution. Also, draw the standard normal distribution indicating where Z and the critical value are located.
In part b, sample have greater variability than part a, but sample sizes are unchanged. How does larger variability influence size of standard error for sample mean?
the national science foundation nfs condust its survey of earned doctorates sed of all individuals receiving research
the clam is that the white blood cell counts of adult females are normally distributed with a standard deviation equal
A department store has determined that 25% of all their sales are credit sales. A random sample of 60 sales is selected. (Please show full steps and excel formulas) a) What is the sampling distribution of?
A corporation owns a factory that produces sulfuric acid. Because of changing conditions, the plant's output is quite variable. The company's president has observed that the output is normally distributed with a mean of 8,200 pieces per hour.
Assume that a random sample of 40 mechanics is selected and the mean rebuild time of the sample is computed. Assuming the mean times are normally distributed, what percentage of sample means are greater than 7.7 hours?
question 1 the average fill volume from a random sample of 49 bottles of an energy drink is 32.8 ounces the standard
provide an appropriate response. define independent and dependent samples and give an example of
in competitive shooting you can always adjust the sights to remove any bias in your aim. therefore the most important
assume that a procedure yields a binomial distribution with a trial repeated n times. use a binomial probabilities
Suppose that {X{t),t ≥ 0} is a Wiener process with drift coefficient M and diffusion coefficient σ2 = 1, where M is a random variable having a uniform distribution on the interval [0,1].
How can we determine whether there are violations of the ANOVA model assumptions?- What should we do if such violations exist?
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