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What is a probability notation? What are the advantages and disadvantages of using a probability notation? How does probability notation aid in decision making?
If random samples, each with n = 9 scores, are selected from a normal population with µ = 80 and σ = 36, then what is the expected value for the distribution of sample means?
Find the value of sample covariance in linear regression model
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
The sampling distribution of mean score is approximately Normal. It has mean. What is its standard deviation?
You are running a chi-squared test. You have 2 groups with 3 characteristics each, what would your critical value be with an alpha of .025?
Find the standard normal area for each of the following: (Round the answers to 4 decimal places.)
Compare 2 moving averages using MSE and compute Exponential smoothing. The subsiquent data which represents demand for company ABC's products for the last 10 months.
A psychology professor is interested in whether implementing weekly quizzes improves student learning. She decides to use the weekly quizzes in one section of her introductory psychology class and not to use them in another section of the same cou..
Choose any Statistic business problem and develop a problem statement which can be addressed with survey research. Prepare a 10-13 question survey to collect primary data regarding your selected problem statement.
Find the 99% confidence interval for the population proportion.
To find the probabilities values of standard normal variable
The population of IQ scores forms a normal distribution with mean of μ = 100 and a standard deviation of σ = 15. What is the probability of obtaining a sample mean greater than M = 105,
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