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Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:
Student # 1 2 3 4 5 6 7 8 9 10Hours Studied 10 15 20 5 0 18 12 18 7 15
For this sample, compute PXi, the sample average (X), P(Xi¡X)2, and the sample standard deviation (s).
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
For a normal distribution, find the z-score value that separate the middle 90% of the distribution from the 10% in the tails.
Solve different inventory control problems using an appropriate OR method.
For binomial distribution among given values for n as well as p state whereas or not it is suitable to use normal distribution as an approximation.
Why do we do power calculations with single sample z test? A) Because we can use Z area tables to calculate the power. B) Because comparing a sample mean against a population mean is very powerful
Complete the table and answer the following questions. Use the .05 significance level.
Which component of a time series is most likely to occur? Which component has a pattern that must be complete in a single year and repeat from year to year?
A case-control study of relationship between liver cirrhosis among both non alcoholics and alcoholics. Describe whether smoking is confounder.
Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of a pain relief drug is normally distributed with mean 2 hours and standard deviation 0.3 hour.
What can you tell me about the direction, strength and significance of this association and What would you expect for somebody without any formal education whatsoever and what can you tell me about the nature of this relationship?
You are given following information on residents' responses, broken down by sex. Determine the probability that resident is a man and opposes the bridge?
A class has 13 women and 18 men. If student if selected randomly, determine the probability student is a woman?
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