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. One of the doctors working in this clinic claimed that...
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Solved (Free): It is known that the duration of consultation with patients in a psychiatry clinic is normally distributed with an average of 35 minutes
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Solved (Free): 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
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 an average of 33.3 and a standard deviation of 12.14.... -
Solved (Free): For a request to use the campus computing cluster, and knowing that your jobs’ durations are normally distributed with a mean of one hour and a standard
For a request to use the campus computing cluster, and knowing that your jobs' durations are normally distributed with a mean of one hour and a standard deviation of 10 minutes, answer the following inquiries. (a) What is the probability... -
Solved (Free): In a study conducted for the effectiveness of drug A on a certain disease, 60 randomly selected patients with this disease were given medication
In a study conducted for the effectiveness of drug A on a certain disease, 60 randomly selected patients with this disease were given medication and 36 patients recovered. Calculate the confidence interval for the efficacy of this drug for a... -
Solved (Free): Students in a high school can choose to study Spanish or French as a foreign language
Students in a high school can choose to study Spanish or French as a foreign language. In a given academic year, 90% of the pupils choose Spanish and the rest choose French. 30% of the students who are learning Spanish... -
Solved (Free): A student suspected the average cost of a date was no longer \$30.00 To test her hypothesis
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 on dates the previous weekend. She found the average cost... -
Solved (Free): The average salary of a male full professor at a public four-year institution offering classes at the doctoral level is
The average salary of a male full professor at a public four-year institution offering classes at the doctoral level is \$109628. For a female full professor at the same kind of institution, the salary is \$79330. If the standard deviation... -
Solved (Free): A data set has a mean of 1,200 and a standard deviation of 80 Using Chebyshev’s theorem, what percentage of
A data set has a mean of 1,200 and a standard deviation of 80. a. Using Chebyshev's theorem, what percentage of the observations fall between 880 and 1,520? (Do not round intermediate calculations. Round your answer to the nearest whole... -
Solved (Free): The lengths of 3 inch nails manufactured on a machine are normally distributed with a mean of 3 and a standard deviation of
The lengths of 3 inch nails manufactured on a machine are normally distributed with a mean of 3 and a standard deviation of .009. The nails are either shorter than 2.98 inches or longer than 3.02 inches are unusable. what... -
Solved (Free): In a study, physicians were asked what the odds of breast cancer would be in a woman who was initially thought to have
In a study, physicians were asked what the odds of breast cancer would be in a woman who was initially thought to have a 1% risk of cancer but who ended up with a positive mammogram result (a mammogram accurately...
