A manufacturing machine has a 3% defect rate.

If 9 items are chosen at random, what is the probability that at least one will have a defect?

Kevin Lopez
2022-07-18

A manufacturing machine has a 3% defect rate.

If 9 items are chosen at random, what is the probability that at least one will have a defect?

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asked 2022-06-20

C. Find the length of the confidence interval given the following data:(s – sample

standard deviation)

1. 𝑠 = 2.36, n = 350, confidence level: 99%

2. 𝑠 = 3.35, n = 250, confidence level: 99%

3. 𝑠 = 3, n = 275, confidence level: 95%

4. 𝑠 = 6, n = 425, confidence level: 98%

5. 𝑠 = 9, n = 501, confidence level: 99%

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suppose a license plate only contains three numbers. the probability of getting an even number or an odd number are the same. What is the probability of having a license plate with all even numbers?

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A manufacturer claims that at most 20% of the items in a stock are defective.

To test this, 20 items are randomly selected from the product.

If at most 3 items are defective, then the manufacturer is statement is accepted.

If the true probability of an item being defective is 0.2.

Find the probability of accepting the manufacturer’s statement?

(Hint: use the Binomial Distribution)

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During a given week, the museum had attendance as shown in the table at right. a. Numerically summarize the center and spread of attendance by finding the median and interquartile range (IQR). b. The museum management needs to tell the staff members their work schedules a week in advance. The museum wants to have approximately one staff member for every 150 visitors. How many staff members should be scheduled to workeach week? Explain your reasoning. c. Why is a scatterplot not an appropriate display of this data?

$\begin{array}{|cc|}\hline Day& Attendance\\ 1& 870\\ 2& 940\\ 3& 731\\ 4& 400\\ 5& 861\\ 6& 680\\ 7& 593\\ \hline\end{array}$