Accuracy in detecting certain kinds

Assignment Help Basic Statistics
Reference no: EM13103354

1. Suppose an airport scanning device has 98% accuracy in detecting certain kinds of metal objects (98% of people carrying these objects are correctly identified as carriers and 98% of people not carrying them are correctly identified as non-carriers). Suppose that 1% of all travelers actually carry such metal objects. For the 100,000 people who pass through the scanning device each week, do the following:

a. Find the number of people not carrying metal objects who are identified as carriers (false positives).

b. Find the number of non-carriers who are identified as non-carriers (true negatives).

c. Find the number of carriers who are identified as non- carriers (false negatives).

d. Find the number of carriers who are identified as carriers (true positives).

e. What percentage of the people identified as carriers are falsely identified?

Reference no: EM13103354

Questions Cloud

Explain why some groups in the us are extremely critical : explain why some groups in the U. S. are extremely critical of corporations that earn growing profits? Is this criticism a function of large CEO salaries or is something else driving these attacks? Discuss.
Less tax revenue : A self-employed commercial artist reports taxable income of $7,000. In reality, her income is considerably higher however much of it takes the form of cash for small projects and thus is easy to conceal
Estimating the proportion of cases of recidivism : A prison official wants to estimate the proportion of cases of recidivism. In examining 250 convicts there are 65 cases. with 99% confidence interval what is the range? How do you figure this type of problem?
What products might you no longer be able to obtain : illustrate what products might you no longer be able to obtain in your country? Choose one other country and identify the products it would need to do without.
Accuracy in detecting certain kinds : Suppose an airport scanning device has 98% accuracy in detecting certain kinds of metal objects (98% of people carrying these objects are correctly identified as carriers and 98% of people not carrying them are correctly identified as non-carriers..
Basics of variation between levels : If 3 different factor levels show a lot of variation between levels this implies:
How giant superstores assist or hurt american capitalism : When large stores move into small communities, many smaller stores can't compete with them and go out of business. Do these giant superstores help or hurt American capitalism?
Social responsibility as the domain of big business : A small computer retailer makes every exertion to satisfy customer needs both before and after the sale. But this retailer regards social problems such as environmentalism as well as economic development as being beyond the scope of his business
Explain the functions of five technological tools used : explain the functions of five technological tools used for developing effective reports and proposals? Identify at least four advantages and four disadvantages for each theory and comprehensively Show explain how each advantage or disadvantage aff..

Reviews

Write a Review

Basic Statistics Questions & Answers

  Digits of numbers in legitimate records

It is a striking fact that the first digits of numbers in legitimate records often follow a distribution known as Benford's Law, shown below.

  Decision about the null hypothesis

What is your null hypothesis? What is your alternative hypothesis? What your decision about the null hypothesis?

  Two measures of central tendency

Given the large difference between the two measures of central tendency, which of the two would you rely on in describing the average claim cost and why?

  Probability of selecting from random variables

If he selects the three brands at random, what is the probability that he will select the following?

  Confidence interval for the population mean number

Calculate an 85% confidence interval for the population mean number of wolf pups per den at southwestern United States (US).

  Determining the z score of samples

For population with mean of µ=60 and a standard deviation of s=24. Determine the z score corresponding to each of following samples.

  Determining the birth and death rates

Assuming an exponential service rate μ, set this up as a birth and death process and determine the birth and death rates.

  Probability of an untrained dog performing

Find the probability of an untrained dog performing as well as Maggie. Is it unusual for an untrained dog to do as well as Maggie?

  Use of centeral tendency

Assume you were in charge of advertising for an automotive dealership when the gas prices increased to $6 per gallon. Most of your cars are fuel-efficient, but you have two models that have extremely poor fuel economy

  Expectation based on national cance-incidence rates

Twelve case of leukemia are reported in people living in a particular census tract over a five year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cance-incidence rates?

  Repairers claim-standard deviation

You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?

  X-bar and r chart

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.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd