To test the durability of a new paint for white center lines, a highway department painted teststrips across heavily traveled roads in eight different locations, and electronic counters showedthat they deteriorated after having been crossed by (data in units x 1000):143168137108126134162150The population data for paint duration are normally distributed.a)Why can we assume that the sampling distribution of the mean is normal even thoughthe sample size is only 8?b)Construct a 95% confidence interval for the average amount of traffic (vehicles) the newwhite paint can withstand before it deteriorates. You may use your calculator tocalculate the mean and standard deviation or use the formulas given X =1128 and EX² = 161 682.

Answered: Image /qna-images/answer/ca776c84-4209-41fa-ae1d-7a004b30c12c.jpg

Answered: To test the durability of a new paint…

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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You may need to use the appropriate technology to answer this question. Forty-minute workouts of one of the following activities three days a week will lead to a loss of weight. Suppose the following sample data show the number of calories burned during 40-minute workouts for three different activities. Swimming Tennis Cycling 413 410 385 380 485 255 425 455 295 400 420 397 422 525 273 Do these data indicate differences in the amount of calories burned for the three activities? Use a 0.05 level of significance. State the null and alternative hypotheses. O H,: Median, = Median, = Medianc H: Mediang + Median, + Median. O H.: All populations of calories burned are identical. H: Not all populations of calories burned are identical. O Ho: Mediang = Median, = Medianc H: Mediang Median. O H,: Not all populations of calories burned are identical. H: All populations of calories burned are identical. O Ho: Mediang + Median, + Medianc H: Mediang = Median, = Median. Find the value of the test…
Among 1815 randomly selected high school students surveyed by the Centers for Diseases Control, 300 said they were current smokers. b. Estimate the variability in such sample proportion by finding SE (p).
). You are interested in investigating if there a difference in mean cholesterol between the four diet groups. What kind of sample and outcome is this?
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Consider the following random sample of data: -7, 5, -1, -1, 8, 1, 7, -4, 8, 80 a) What is the mean of the sample data? Round your response to at least 2 decimal places. Number b) If the outlier is removed, what is the mean of the remaining sample data? Round your response to at least 2 decimal places. Number
Oprah Winfrey has closed on a 42-acre estate near Santa Barbara, California, for $52,000,000. If Oprah puts 30% down and finances at 6.5% for 30 years, what would her monthly payment be? (Do not round intermediate calculations. Round your answer to the nearest dollar amount.)
The type of household for the U.S. population and for a random sample of 411 households from a community in Montana are shown below. Type of Household Married with children Married, no children Single parent One person Other (e.g., roommates, siblings) Percent of U.S. Households 26% 29% 9% 25% 11% Observed Number of Households in the Community 106 112 37 91 65 Use a 5% level of significance to test the claim that the distribution of U.S. households fits the Dove Creek distribution.
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