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Can you describe in detail the differences in ANOVA and the five-step hypothesis testing method?
1. State hypothesis and althernate.
2. Level of significance.
3. Identify test statistic.
4. Formulate decision rule.
5. Make the decision to accept or reject null hypothesis.
It is believed that population standard deviation is 15 days. If test is conducted using 0.05 level of significance, what conclusion must be reached?
Suppose that among all participants, the mean test score is 70.07 and the standard deviation is 10.27. Use z-scores to interpret a raw score of 80. What is the corresponding z-score? How would you interpret this result? Show your work.
Suppose that sales of lemonade and sales of brownies are independent, determine standard deviation in his revenue.
You're operating a business in very competitive market. You're not yet the dominant player, but you have invested heavily in marketing and product development and it has paid off with a steady growth rate of 10%.
In the last municipal election, a sample of 350 registered voters showed that 85 voted for the incumbants. Find out a 98% confidence interval estimate for the proportion of all voters voting for the incumbants.
If there are 12 business-class passengers and 50 tourist-class passengers on a particular flight, what are the expected value of total luggage weight and the standard deviation of the total luggage weight?
Critically illustrate out the properties of a normal distribution. Explain why there are an infinite number of normal distributions.
Test whether the mean rate is less than 6%. Use P-value approach.
A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assume that a random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?
Project was estimated by using ADM/PERT analysis. Due to extensive length of project many activities were combined; Following is the result.
Below are revenue and profit (both in $ billions) for nine large entertainment companies.
Select a random variable to represent the category. Produce a probability mass function for that variable, and use it to compute the mean, the median and the variance of the data in the data set. Show the probability mass function, both in tabular..
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