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At one hospital, 674 women were diagnosed with breast cancer. Five years later, 88% of the Caucasian women and 83% of the African American women were still alive. A researcher concludes that being Caucasian causes women with breast cancer to have an increased chance of surviving five years. Since there is no random assignment and there may have been lurking variables, this conclusion is not justified. Which of the following are possible lurking variables?
Is it an SRS? A corporation employs 2000 male and 500 female engineers. A stratified random sample of 200 male and 50 female engineers gives each engineer.
A group of friends debated whether more men use smartphones than women. They consulted a research study of smartphone use among adults.
Following are the numbers of daily bids received by the government of a developing country from firms interested in winning a contract for the construction of a new port facility- Find the quartiles and the interquartile range.
PCBs are a class of chemicals often found near the disposal of electrical devices. PCBs tend to concentrate in human fat and have been associated with numerous health problems. Determine the mean, median, and standard deviation. Find the 25th, 50th..
Use Hypothesis testing to determine if Dr. Boom is correct, that his sample of 25 rockets weight less than the average rocket.
there are 4000 mangoes in a shipment. it is found that it has a mean weight of 15 ounces with a standard deviation of
Be sure to include information about how you would use the concept of probabilities to apply to profiles for hiring more satisfied individuals.
An employee is to be selected randomly from this population. Let A be the event that the employee scores a passing grade on the exam and let M be the event that a male is selected. Are the events A and M independent
Because of the population problem, in China, married couples lose various governmental benefits after the birth of which child?
During a specific hour of operation, = 23.7 inches. Should the assembly line be shut down? Use a = 0.05. b. Using a 5 0.05, find the critical values in the x world.
acceptance samplinga teletronix company purchases large shipments of fluorscent bulbs. they randomly select and test 24
Random sample of 100 voters showed that 55 of those sampled will vote for her. Is it likely that her assertion is correct at the 0.05 level of significance?
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