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Question: Suppose that the price of stock A is AED 25 and its standard deviation is 5. The average market price for all similar stocks is AED 20.Another stock B has a price of 30 and standard deviation of 15. Which stock performed better relative to the market?
Can Mr. Rutter conclude that the mean weight of the bags is less than 50 pounds? Use the 0.1 significance level. In a brief report, tell why Mr. Rutter can use the z distribution as the test statistic.
A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
Create a 99% confidence interval for mean overall duration of symptoms in population of individuals who used zinc lozenges.
Psychologists wanted to test whether a certain accelerated class' IQ was different than average. There were 25 students in the class; their mean IQ score was 108.
Clearly a straight line model does not accurately describe what is going on with this data. Does this mean there is no relationship between income and time?
For a regional survey of suburban households to obtain data on television viewing habits, a statistical sample of suburban areas is first selected. Within the chosen areas, statistical samples of whole blocks are selected; and within the selected..
The main part of the ACS contacts 250,000 addresses by mail each month, with follow-up by phone and in person if there is no response. Each household answers questions about their housing, economic, and social status. What is the Population.
If the claim says that the population mean is greater than 200 and the sample mean is 215, we can say that the claim is true even without a formal test.
Find its marginal revenue function?
The current advertising campaign for a major automobile brand would be changed if fewer than 70 percent of the consumers like it.
Determine the probability that sample mean is between 7.5 and 8 minutes?
describe the types of probability.classify the statement as an example of classical probability empirical probability
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