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Among persons donating blood to a private clinic, 80% have Rh+ blood. Five persons donate blood at the clinic on a particular day. Find the probability that at least one of the five does not have Rh+ blood.
Test research hypotheses that there is a difference in level of education between liberals and conservatives, set alpha at .01. Would your decision have been different if alpha were set at .05?
Suppose that 51% of the women who gave birth at a certain hospital last year were over 30 years old, and that 39% were unmarried.
A person is planning on saving money according to a rigid savings schedule. Saving plan A is to make an initial deposit of $400 and then deposit $20 per month into the account.
A Starbucks manager decides to study waiting times of customers for service at the lunch time rush hour 1100-1200. He observes three customers to measure the time the customer enters the line to the time he or she reaches the counter.
Three times each year, the procurement manager at Phoenix contacts National\'s marketing department to place a monthly order for each of the coming four months.
What is the mean and standard deviation for this groups' SAT verbal score? What is the 95% confidence interval for the mean SAT verbal score for these students?
If two people are randomly selected, what is the probability both are hopelessly romantic? What is the probability at least one is hopelessly romantic.
Distances from the past year and carry out a hypothesis test for its suspicion. State the null hypothesis and the alternative hypothesis that it would use for this test.
In what situations might you use probability as a manager to approach business-related problems? What are the advantages to using probability concepts in business decisions?
When using the distribution of sample means to estimate the population mean, what is the benefit of using larger sample sizes?
The probability of going to college is 0.4. What is the probability that the proportion of women who go to college is greater than 50%.
What is the probability that an individuals clotting time will be more than 3 seconds and less than 11? Assume a normal distribution
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