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Question: Pregnant? Suppose that 70% of the women who suspect they may be pregnant and purchase an in-home pregnancy test are actually pregnant. Further suppose that the test is 98% accurate. What is the probability that a woman whose test indicates that she is pregnant actually is?
The standard deviation of 6. What is the probability that a class of 50 has an average midterm mark that is less than 75?
What about drawing a random sample only from cell phone exchanges? Discuss the advantages and disadvantages of such a sampling method compared with surveying randomly generated telephone numbers from non - cell phone exchanges.
Two numbers are randomly drawn without replacement from a list of five. If the five numbers are 2, 2, 4, 6, 8, what is the probability distribution.
What is the standard error of estimate? Briefly describe how you interpret this statistic. What is the coefficient of determination? What does this statistic tell you?
serum ferritin is used in diagnosing iron deficiency. in a study conducted recently researchers discovered that in a
mitch thinks that there is a difference in quality of life between rural and urban living. he collects information from
In recent year, of the 109,857 arrest fro federal offenses, 29.1% were for drug offenses. Use a .01 significance level to test the claim that the drug offense rate is equal to 30%.
Based on the answer from question 9, calculate 90% confidence limit around your best estimate of the average savings.
Records maintained by the office of budget in a particular state indicate that the amount of time elapsed between the submission of travel vouchers and the final reimbursement of funds has approximately a normal distribution with amean of 39 days ..
Approximately what percentage of the manufacturer's batteries will last between 40 months and 80 months? suppose your battery lasts 37 months. What could you infer about the manufacturer's claim?
Estimate the number of customers in the sample who order their food to go by giving the mean of the relevant distribution (that is, the expectation of the relevant random variable).
Victor Anderson, the owner of Anderson Belts, Inc., is studying absenteeism among his employees. His workforce is small, consisting of only five employees.
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