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Two people are going from Seattle to Portland. Alice has 50% chance of arriving at 5:00 and a 50% chance of arriving at 6:00. Bob's arrival time is independent of Alice's. The number of minutes after 4:30 that he arrives is an exponential random variable with mean 45. What is the probability that Alice arrives before Bob?
A study to get a quick idea of the medical acceptability of a new aspirin substitute which cannot be dispensed over the counter without prescription.
1.a manufacturer of infant formula is running an experiment using the standard control formula and two new formulas a
Use a data to obtain 95% confidence interval using your formula from Number 7. Does your interval contain the correct value?
The data comes from a set of scores on a 50 point Bilogy 101 test. 90 subjects took the test. The scores range from 12-50. How to make a simple frequency distribution table, using the raw data?
After a logarithmic transformation, we obtain the following regression result of Cobb-Douglas production formula for a firm:
The rate of service calls per month was researched yielding the following results (no of service calls divided by the number of equipment): Do these data indicate that the program is effective?
In considering doing a logistic regression using the Enter method, it was suggested that I may want to consider doing a sequential LSR or stepwise logistic regression instead.
Hypothesis testing of single mean - The Wall Street Journal reported that the 30-year mortgage rate is now less than 6%.
As part of the National Health and Nutrition Examination Survey, the Department of Health and Human Services obtained self-reported heights and measured heights for males aged 12-16. All measurement is in inches. Listed below are sample results.
At the 0.01 significance level, is there a difference in the mean number of times men and women order takeout dinners in a month? Calculation of the p-value is not required.
What time usage guarantee (in hours) should the manufacturer advertise in order to ensure that only 4% of the cartridges fail to meet the guaranteed time usage?
A random variable is normally distributed with a mean of 25 and a standard deviation of 5. If an observation is randomly selected from the distribution:
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