urable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle covery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the inkle recovery angle (in degrees) for two types of treated fabrics: Permafresh Hylite 15 17 12 14 13 16 16 15 14 18 nanufacturer wants to know how large is the difference in mean wrinkle recovery angle. re a 98% confidence interval for the difference in mean wrinkle recovery angle: [three decimal accuracyl (three decimal accuracyl
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
!["Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle
recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the
wrinkle recovery angle (in degrees) for two types of treated fabrics:
Permafresh Hylite
15
17
12
14
13
16
16
15
14
18
A manufacturer wants to know how large is the difference in mean wrinkle recovery angle.
Give a 98% confidence interval for the difference in mean wrinkle recovery angle:
[three decimal accuracy] [three decimal accuracy]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdc7098a4-7e9d-4718-b1b7-d54351cff1ff%2Fed48857c-b1ad-4d8a-9266-f32920de7df5%2F12jd6aj_processed.png&w=3840&q=75)
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