"Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinklerecovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on thewrinkle recovery angle (in degrees) for the same fabric specimens discussed in the previous exercise:PermafreshHylite156148152197151187122142133A manufacturer wants to know how large is the difference in mean wrinkle recovery angle.a. The mean and the standard deviation for the Permafresh are:Round to 3 decimal places.Round to 3 decimal places.b. The mean and the standard deviation for the Hylite are:Round to 3 decimal places.Round to 3 decimal places.c. The standard error is:SE =Round to 3 decimal places.The critical value from the distribution for a confidence interval of 99.8% is:t=Use degrees of freedom of 3. Use Technology. Round to 3 decimal places.d. Using the the answer from above (all rounded to 3 decimal places), calculate by hand a 99.8%confidence interval for the difference in mean wrinkle recovery angle:toHint Round to 3 decimal places.

Answered: Image /qna-images/answer/41237979-254b-41ac-b7ba-af3bf9a030d5.jpg

Answered: "Durable press" cotton fabrics are…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A researcher is looking at a new marketing campaign for a product. After 200 people watched the marketing campaign about 60 percent liked the product. Prior to the marketing campaign the product was liked by about 50 percent of people. What are the chi-square test degrees of freedom for this research description?
Are cigarettes bad for people? Cigarette smoking involves tar, carbon monoxide, and nicotine (measured in milligrams). The first two are definitely not good for a person's health, and the last ingredient can cause addiction. Use the data in the table above to make a stem-and-leaf display for milligrams of nicotine per cigarette smoked. In this case, truncate the measurements at the tenths position and use two lines per stem. (Enter NONE in any unused answer blanks.)
aChen -. M Gmail YouTube Maps oscar - Google D... Translate New Tab ece Gler 2/6 100% SID: 2. A researcher is studying the relationship between various properties of wine and their taste characteristics. The histogram below shows the amount of residual sugar (sugar left after fermentation) in a collection of wines. However, one of the bars, between 3 and 5 grams per liter, is missing. 50 (47.9) (38.7) 30 10 (0.1) (0.92) (0.1) 2 10 15 Residual sugar (grams/liter) Calculate the height of the missing bar and draw it in. (Show your work below, and indicate the numerical value in parentheses above the bar.) % per gramlter
Glaucoma is a leading cause of blindness in the United States, N. Ehlers measured the difference in corneal thickness (in microns) between the two eyes of eight patients. Each patient had one eye that had glaucoma and one eye that was normal. The difference was measured as the corneal thickness of normal eye – corneal thickness of eye with Glaucoma. Corneal thickness is important because it can mask an accurate reading of eye pressure. Use ? = .05. Hypothesis: H0: μd=0Ha: μd≠0 Using output Test statistics : t=0.134P value=0.897 Degrees of freedom (df): df=7 Level of significance: α=0.05 Decision: P value > 0.05 thus we fails to reject null hypothesis. Question a)Write a report summarizing your findings. When writing the report consider that medical staff estimate that a difference of 4.5 microns or more could impact on their ability to interpret eye pressure correctly. b) Define for the hypothesis stated in part b) what a type 1 error and type 2 error would mean. Is it possible…
Construct a stem-and-leaf display of the data. What appears to be a representative strength value? Do the observations appear to be highly concentrated about the representative value or rather spread out? b. Does the display appear to be reasonably symmetric about a representative value, or would you describe its shape in some other way? c. Do there appear to be any outlying strength values? d. What proportion of strength observations in this sample exceed 10 MPa? The strength data for beams is attached
Water is poured into a large, cone-shaped cistern. The volume of water, measured in cm, is reported at Which of the following would linearize the data for volume and time? different time intervals, measured in seconds. The scatterplot of volume versus time showed a curved Seconds, cm3 O In(Seconds), cm3 Seconds, In(cm') pattern. O In(Seconds), In(cm³)
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A statistical program is recommended. Head movement evaluations are important because individuals, especially those who are disabled, may be able to operate communications aids in this manner. An article reported data on ranges in maximum inclination angles of the head in the clockwise anterior, posterior, right, and left directions for 14 randomly selected subjects. Consider the accompanying data on average anterior maximum inclination angle (AMIA) both in the clockwise direction and in the counterclockwise direction. Subj: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Clockwise (Cl): 57.9 35.7 54.5 56.8 51.1 70.8 77.3 51.6 54.7 63.6 59.2 59.2 55.8 38.5 Counterclockwise (Co): 43.2 52.1 59.2 51.7 47.2 65.6 71.4 48.8 53.1 66.3 59.8 47.5 64.5 34.5 (a) Calculate a point estimate of the population correlation coefficient between Cl AMIA and Co AMIA Cl = 786.7, Co = 764.9, Cl2 = 45,727.31, Co2 =…
A researcher interested in the lobster fishery analyzed a population of lobsters living in shallow waters off a cove in Maine. He measured the length of all the lobsters in the population. The data is shown below. Min 11.4 Table 1: Lengths of Maine Lobsters (cm); (N=2,581) Quartile 1 Q2 (Med) 23.4 41.1 Quartile 3 56.8 Max 71.5 What is true of a lobster that is 56.9 cm in length? O It's bigger than all but one of the lobsters in that area About half the lobsters in the area are bigger, and about half are smaller that that lobster It is bigger than about 25% of the lobsters in that area O About 75% of the lobsters are smaller than that lobster
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HAV is a deformation of the big toe that often requires surgery. Doctors used X-rays to measure the angle (in degrees) of deformity in 38 consecutive patients under the age of 21 who came to a medical center for surgery to correct HAV. The angle is a measure of the seriousness of the deformity. Here are the data. 292216 321828 231529 352322 372249 261623 263328 202530 321933 242138 262230 112023 2124 It is reasonable to regard these patients as a random sample of young patients who require HAV surgery. Given a 95% confidence interval for the mean HAV angle in the population of all such patients, find the following. x (mean) = s=(standard deviation) = Confidence Interval: ° to ° Conclusion 1) We are 95% confident that the mean HAV angle among such patients is within this interval. 2) We are 95% confident that the mean HAV angle among such patients is outside this interval. 3) The mean HAV angle among such patients will always be outside this interval 95% of…

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