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Consider the time series modelyt = 200 + 0.7yt-l + eConsider the time series modelyt = 200 + 0.7yt-l + eta. Is this a stationary time series process?b. What is the mean of the time series?c. If the current observation is y100 = 750, would you expect the next observation to be above or below the mean?
if 42 of registered voters in a country are registered democrat and we select 8 random voters what is the probability
suppose that a health expert has claimed that 17 of college students smoke cigarettes. to investigate this claim
The population standard deviation was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for the population mean?
Of those not having lung disease, 25.3% are smokers. Determine the probability that a randomly selected smoker has lung disease.
a garment manufacturing company recorded the amount of time that it took to make a pair of jeans on 8 different
Describe how to calculate the odds against an event happening when you know the probability of the event occuring. Use a numerical example to illustrate your explanation.
What two assumptions must be met when you are using the z test to test differences between two means? Can the sample standard deviations s1 and s2 be used in place of the population standard deviations σ1 and σ2?
Test of product quality using human inspectors can lead to serious inspection error problems. To evaluate the performance of inspectors in a new company, a quality manager had a sample of 12 novice inspectors evaluate 200 finished products.
Find out the expected shape of distribution of sample mean?
a certain brand of candies have a mean weight of .8592 g and a standard deviation of .052 based on a sample of a
The test statistic for a two-sided significance test for a population mean is z = -2.12. What is the corresponding P -value?
Do you agree or disagree? Discuss briefly. Notes. "Baseline characteristics" are characteristics of subjects measured at the beginning of the study, i.e., just before randomization. The quote, slightly edited, is from Victora et al (2004).
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