A random sampling of chicken in supermarkets revealed that approximately 80% was contaminated with an organism. Of the contaminated chicken, 20% had the strain that is resistant to antibiotics. Construct a relative frequency distribution showing the following outcomes when chicken is purchased at a supermarket: U: the chicken is not infected with the organism; C: the chicken is infected with the nonresistant organism; R: the chicken is infected with the resistant organism. P(U) = P(C) = P(R) =

A random sampling of chicken in supermarkets revealed that approximately 80% was contaminated with an organism. Of the contaminated chicken, 20% had the strain that is resistant to antibiotics. Construct a relative frequency distribution showing the following outcomes when chicken is purchased at a supermarket: U: the chicken is not infected with the organism; C: the chicken is infected with the nonresistant organism; R: the chicken is infected with the resistant organism. P(U) = P(C) = P(R) =

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Solid fats are more likely to raise blood cholesterol levels than liquid fats. Suppose a nutritionist analyzed the percentage of saturated fat for a sample of 6 brands of stick margarine (solid fat) and for a sample of 6 brands of liquid margarine and obtained the following results: Stick:[25.5,26.7,26.5,26.6,26.3,26.4] Liquid:[16.5,17.1,17.5,17.3,17.2,16.7] We want to determine if there a significant difference in the average amount of saturated fat in solid and liquid fats. What is the test statistic? a) z = 39.604 b) t = 25.263 c) t = 39.604 d) z = 39.104 e) t = 39.104
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The records of a light bulb manufacturer show that, when the manufacturing machinery is working correctly, the defect rate (due to imperfections in the material used) is 1%. The manufacturer's control department periodically tests samples of the bulbs, and when 1.25% or more are defective, they call repair technicians for service. The control department is going to take a random sample of 4400 light bulbs. Let p be the proportion of defective light bulbs in the sample assuming the machinery is working correctly. A) find the mean of p b)find the standard deviation of p c)Compute an approximation for P≥p0.0125, which is the probability that, assuming the machinery is working correctly, the repair technicians will be called. Round your answer to four decimal places.
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