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Q1) Researcher wants to estimate , with 90% confidence, percentage of adults who support abolishing penny. His evaluation should be correct within 3% of true proportion.
a) Determine minimum sample size needed, using a previous study that found that 34% of the respondents said they support abolishing penny
b) No preliminary estimate is available. Determine minimum sample size needed.
b) Compute the minimum sample size required assuming that no prior information is avaiable?
FBI Report do greater universities that tend to have more property crime. Keep a scatter diagram also sketch the line you think best fits the data.
Compute descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Compute the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which..
Find the probability of committing a type I error.
A point estimate for the difference between the mean purchases of the users of the two credit cards is:
Between what two values does the P -value of this test fall?
Determining probability values using the Binomial distribution.Use the Binomial distribution to determine the probability that four or more of the contracts are in breach of the tendering guidelines.
Which combination of factors has greatest likelihood of rejecting null hypothesis?
In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:
What is the expected number of customers that will have to wait more than 6 hours?
Let us speek where the preceding data are representative of the entire sector of retail sales companiesSuppose the annual profits are more than 6.5 thousand $ every employee.
Calculate a 95% confidence interval for the mean endowment of all the private colleges in the United States assuming a normal distribution for the endowments.
Test out an suitable hypothesis also state your conclusion. Make sure the suitable assumption as well as conditions are satisfied before you proceed.
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