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It is known that the duration of consultation with patients in a psychiatry clinic is normally distributed with an average of 35 minutes and a standard deviation of 5 minutes.…
Oxygen levels are measured to control breathing in symptoms of a disease. In the measurements taken from 242 people, it was observed that the oxygen values were normally distributed with…
A student suspected the average cost of a date was no longer \$30.00 To test her hypothesis, she randomly selected 16 men and asked them how much they had spent…
ABC Company claims that the proportion of its employees investing in individual investment accounts is higher than national proportion of 50%. A survey of 100 employees in ABC Company indicated…
Data from the Framingham study allow us to compare the distribution of initial serum cholesterol levels for two population of males; those who go on to develop coronary artery disease…
A physician claims that 13.6% of all pregnant females smoke during their pregnancy. A random sample of 400 pregnant women revealed that 60 of them are smoking while pregnant. Test…
A math instructor has written a new placement exam. He is concerned that the exam may be too long. The instructor claims that the average length of time required to…
A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is greater than 450. To do so, she selected…
Two business schools, A and B, located in the same metropolitan area and they are competing for bragging rights. One of the points of competition is average salary of graduating…
A researcher claims that average body temperature is different for the two genders. A sample of 65 men and 65 women yields average body temperatures of 98.105 and 98.394 oF,…
