4. At a factory that produces switches, a batch of 3000 switches has just beenproduced. To check the quality of the switches, a random sample of 75 switchesare selected to test for defects. Out of these 75 switches, 2 were found to bedefective. Based on these results, what is the best estimate you can give for thenumber of defective switches in the batch of 3000? Solve this problem in twodifferent ways, explaining your reasoning in each case.

Given that at a factory that produces switches, a batch of 3000 switches has just been produced. To…

Answered: 4. At a factory that produces switches,…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Similar questions

In a random sample of 100 parts ordered from vendor A, 12 were defective. In a random sample of 200 parts ordered from vendor B, 10 were defective. Estimate the proportion of parts from vendor A that are defective and find the uncertainty in the estimate.   Estimate the proportion of parts from vendor B that are defective and find the uncertainty in the estimate.
How would you conduct a sample of people in your community so that you could see which flavors are most popular? Give specific details of how you would collect your data, and state how many responses would be sufficient.
Plzz explain. Ty
A polisher wishes to estimate the proportion of United States voters who favor capital punishment. How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 3%
1) A consumer research company wants to estimate the average cost of an airline ticket for a round trip from New York to Los Angeles. A random sample of 50 airfares had an average price of $438. Identify the variable. (a) Simple random sample (c) Consumer research company (b) Airline fare (d) City e) $438
just the last part, thank you!
A random sample of 600 people from a certain district were questioned and the results indicated that 30% used a particular product. In a second random sample of 300 people. 96 used the product. Using the data from the two samples, find the best estimate of the proportion of people in the district who used the product.
In a survey of 3367 adults aged 57 through 85 years, it was found that 84.2% of them used at least one prescription medication. How many of the 3367 subjects used at least one prescription medication?
A consumer group wanted to determine if there was a difference in customer perceptions about prices for a specific type of toy depending on where the toy was purchased. In the local area there are three main retailers: W-Mart, Tag, and URToy. For each retailer, the consumer group randomly selected 5 customers, and asked them to rate how expensive they thought the toy was on a 1-to-10 scale (1= not expensive, to 10 = very expensive). The toy was priced the same at all retail stores. 1. What kind of statistical test should be used to test the consumer group's research goal, assuming that the researcher wanted to use the 1-to-10 scale as a numerical interval measure? A. Repeated-measures t-test B. One-way Independent Measures ANOVA C. Repeated-measures ANOVA D. Independent-measures t-test 2. State the hypothesis that aims to test the consumer group’s research goal (i.e., what is H0 and HA).
To collect data about the number of students in your high school who have a part time job, which of the following methods is most likely to lead to a sample that is the most representative of the students in your school? Interview all the girls in the school. Ask the principal. Interview all the students in 9th grade. Assign each student in the school a number and randomly select students to be interviewed. Interview all the students who are on the sports teams in the school.
Suppose a community college has 10,000 students (the population). We are interested in the average amount of money a part-time student spends on books in the fall term. Asking all 10,000 students is almost an impossible task. A sample is taken using a list of students who take photography classes, and each of these students is surveyed. Do you think that this sample is representative of the entire 10,000 student population? Why or why not?

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