Correct and wrong identification

Reference no: EM1320632

A study published in the British Medical Journal described how dogs were used in an attempt to identify patients having bladder cancer. A trial involved six different samples of urine from healthy people plus another sample of urine from a person known to have bladder cancer. The trail was repeated 54 times with 22 correct identifications and 32 wrong identification.

a. Given that each trial involved six healthy samples and one sample from a patient with bladder cancer, what is the probability that a dog would select the cancer sample if it made a random guess?

b. Among the 54 trails, there were 22 correct identifications. Test the hypothesis that the dogs did significantly better than what would be expected with random guessing. Does it appear that the dogs were guessing. Does it appear that the dogs were guessing, or do they appear to have some ability to identify the cancer sample?

c. Assuming that the dogs did better than what would be expected with random guessing, did they do well enough to be used for actual medical diagnoses? Why or why not?

Reference no: EM1320632

Questions Cloud

Determining solution which is normally distributed with mean : Health and Nutrition Examination Survey, suppose that weights of men now are normally distributed with mean of m =172 pounds and standard deviation of s = 29 pounds.

Determining the salary of person : Write down a program which determines how much a person earns in a month in case the salary is one penny first day, two pennies second day, four pennies the third day, and so on with the daily pay doubling each day employee works.

Price of cigarettes also the quantity of cigarettes sold : Illustrate what effect this could have on the price of cigarettes also the quantity of cigarettes sold

Probability questions : Probability questions

Correct and wrong identification : The trail was repeated 54 times with 22 correct identifications and 32 wrong identification.

Public debt is included as a part of government purchases : Interest on the public debt is included as a part of government purchases in the determining GDP may arise since.

Selecting a life-cycle model for project : She wishes your organization to build a product which will monitor the company’s stock, starting with purchasing of leather and keeping track of boots as they are manufactured, distributed to individual stores, and sold to customers.

Find the probability that a senior citizen : Find the probability that a senior citizen takes either blood pressure-lowering or cholesterol-lowering medication

Determining percentage of take-out pizzas : Assume that Leo advertises "If it takes more than 30 minutes to get your pizza, you get it free". What percentage of his take-out pizzas will have to give away free?

User Account

All Pages