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You want to develop a 90% confidence interval with a margin of error of 7. If the population standard deviation is 49, what size sample do you need?
Statistics and Probability, Statistics
Can a business have too much money in Cash, meaning cash on hand as well as in checking and savings accounts? What if a business had 100 million dollars in these cash accounts but only needed half of that for what Keynes ...
In a random sample of 50 ?refrigerators, the mean repair cost was ?$146.00 and the population standard deviation is ?$17.80. Construct a 90?% confidence interval for the population mean repair cost. Interpret the results ...
Based on the 1990 census, the number of hours per day adults spend watching television is approximately normally distributed with a mean of 5 hours and a standard deviation of 1.3 hours. What proportion of the population ...
How much of the opposing side should you share in a presentation to a multiple-perspective audience, and what techniques would you use?
Assignment - A dashboard-type report for the case study. You may use Excel or Tableau. The data analysis should be improved from Assignment 1 based on the feedback received and further tools and techniques you learnt in ...
What is the sample size for studies with MOE of +/-3.5% and +/-2.8%?, with a confidence level of 95%, sample statistics of .50? Please show work.
Bob is interested in studying whether the average household income in city A is lower than the national benchmark, μ 0 = $51,500. He collects income information from a random sample of 100 households, conducts a one-sam ...
If a study was done to measure the total brain volume of patients that had schizophrenia and also of patients that are normal. Table 1 has the total brain volume of the normal patients and table 2 has the total brain vol ...
If the return on stock A in year 1 was 11 %, in year 2 was -10 %, in year 3 was -4 % and in year 4 was 2 %, what was the standard deviation of returns for stock A over this four year period? (Round your answer to 1 decim ...
Determine the critical? value(s) for a? left-tailed test of a population mean at the alpha α=0.01 level of significance based on a sample size of n=15.
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