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It has been reported that the average US office worker receives 14 fax messages per day. For purposes of this exercise, we will assume that the daily number of fax messages is normally distributed with a standard deviation of 5.0 messages. For an office in which 10 workers are employed and considering these person as a simple random sample of all US office workers, what is the probability that the office will receive at least 160 fax messages (i.e., a sample mean of at least 16 faxes per worker) next Wednesday?
New car manufacturer claims that miles per gallon for gas consumption is mound shaped and symmetric with a mean of 25.9 mpg with a standard deviation of 9.5 mpg.
Show how to generate a random variable from the exponential distribution function shown above. Show derivation of the equation.
Use three decimal places in your answers for this problem. The following table was collected.
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
Which are likely to be independent events? For those you think are not, suggest reasons why.
Estimate the population in 1600 and graph the population trend from 1600 through to 2000
Distinct random variable
Complete the test at the 5% level of significance.
Based on chi-square table, what is the most correct statement which can be made about the p-value for the test?
What are the mean value and standard deviation of the number among these 15 that are from the second section? What are the mean value and standard deviation of the number of projects not among these first 15 that are from the second section?
A market analyst for the Weber Refrigerator Company has visited various appliance stores in a city to get data on the selling price of different brands of refrigerators. Estimate the population regression equation and interpret the result
Compute a 95% confidence interval for the mean using the formula and where is the mean of the ten random numbers.
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