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Suppose the weight of a product is normally distributed with a mean of 1.5 and a variance of 0.2.
What percentage of products will have weights within +/- 3 standard deviations?
Critically discuss the lower and upper limits bounding 50% of product weights?
Determine the weight where no more than 1% of all products will exceed that amount.
First explain what the Gini coefficient is and what hypothetical Gini values of 0 and 1 mean. Sort the data by the Gini coefficient in 2000 and look at the list of countries.
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
Different approaches for creating systems simulation models include?
Following are the data collected. Should the head of the Bureau be concerned about the time taken at lunch by employees? Why?
The Absent Minded Professor study was a RCT, which had an objective to estimate the protective effect of drug "No-Reminder" compared to drug "Reminder" on risk of "Forgetful syndrome". The study found that the drug "No-Reminder" was protective.
A group of investors wants to develop a chain of fast food cafés. In determining potential costs for each facility, they must consider, among other costs, the average monthly cost of electricity.
Researchers at the Brigham & Women's Hospital recruited 2,000 participants to study the relation between diet and cholesterol.
What is the probability of selecting a store at random and finding it has both a pharmacy and a floral shop?
What was the cost for the 10 percent of employees who incurred the highest dental expense?
Assume that 60 percent of the voters in a particular region support a candidate. Find the probability that a sample of 1,000 voters will yield a sample proportion in favor of the candidate within 4 percentage points of the actual proportion.
Four percent of the customers of a store buy cigars. Half of the customers who buy cigars buy beer and one fourth of those who buy beer buy cigars. The table is given below:
A population of 1000 students spends an average of $10.50 a day on dinner. The standard deviation of the expenditure is $3. A simple random sample of 64 students is taken.
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