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ANF produces nonwoven fabric. An important measurement is the tensile strength, which is the strength of the fabric to avoid being torn apart. One customer has specified that the mean tensile strength must fall between 240 g/si (grams per square inch) and 300 g/si. Based on past data, the 3σ control limits for the mean tensile strength are 249 and 285 g/si. Discuss the ability of the process to meet the customer's specifications. Also, if the customer seeks Six Sigma compliance, what are your recommendations?
Find the 90% confidence interval of the true mean weight of all college wrestlers. If a coach claimed that the average weight of the wrestlers on the team was 310, would the claim be believable?
How many students should be surveyed to estimate the mean score within 25 points with 90% confidence?
Problem: Two rainstorms occurred in one week in a certain area. In the first storm 30 ml of rain fell per hour, and in the second storm 20 ml of rain fell per hour.
On which test did he do better compared to the rest of the class?
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
USA snapshot presented a bar graph depicting business travelers' impression of wait times in airport security lines over the past 12 months. Statistics were derived from Travel Industry Association of American Business Traveler Survey of 2034 resp..
Create the indicated confidence interval for population mean using (a) t-distribution. (b) If you had incorrectly used normal distribution, which interval would be wider?
Please help me with the following 3 problems. There are only a few that I can't seem to figure out. Please use excel and show me a step by step solution to give me a full understanding. Thanks a lot!
A toy manufacturer wants to see how long, on average, a new toy captures children's attention. He tests 10 children selected at random and finds that their mean attention span is 33 minutes with a standard deviation of 6 minutes.
You are given the choice of three doors. Behind one is a new car and the others hide a barnyard animal for you to keep. After you choose door number one, your host (Monty) opens door three to reveal a goat.
Suppose the annual consumption of chicken mean is 20.84 pounds per person and that the standard deviation for the consumption of chicken per person is 9.193 pounds.
Should Martha use an independent-samples t-test or a related samples t-test? Explain your answer.
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