State the conclusion based on the results of the test.The mean of the pressure required to open a certain valve is known to be µ = 8.3 psi. Due to changes in the manufacturing process, the quality-control manager feels that the average pressure has been reduced. The nullhypothesis was not rejected.Choose the correct answer below.A. The mean of the pressure has been reduced.B. There is not sufficient evidence that the mean of the pressure required to open a certain valve has been reduced.C. There is sufficient evidence that the mean of the pressure required to open a certain valve has been reduced.D. There is not sufficient evidence that the mean of the pressure required to open a certain valve has not changed.E. The mean of the pressure has not changed.O F. There is sufficient evidence that the mean of the pressure required to open a certain valve has not changed.

The question is about hypo. testing Given : Popl. mean pressure req. to open a certain valve ( μ ) =…

Answered: State the conclusion based on the…

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 student who took Stat 2 last semester learns that their overall course score was at the 85th percentile. Assuming that a histogram of all the Stat 2 course scores from last semester follows the normal curve, this means that this student had a score that was how many SDs above the average score? Choose the answer that is closest. Group of answer choices 1.15 1.05 1.10 1.0 PreviousNext
Suppose the lengths of human pregnancies are normally distributed with µ = 266 days and o = 16 days. Complete parts (a) and (b) below. ..... (a) The figure to the right represents the normal curve with u = 266 days and o = 16 days. The area to the right of X= 300 is 0.0168. Provide two interpretations of this area. %3D Provide one interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) A. The proportion of human pregnancies that last less than days is O B. The proportion of human pregnancies that last more than days is 266 300 Provide a second interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) O A. The probability that a randomly selected human pregnancy lasts more than days is B. The probability that a randomly selected human pregnancy lasts less than days is (b)…
Find the margin of error for the given values of c, o, and n. c = 0.95, o = 2.8, n = 81 Click the icon to view a table of common critical values. E = (Round to three decimal places as needed.)
Find the margin of error for the given values of c, o, and n. c= 0.90, o = 3.4, n= 36 Click the icon to view a table of common critical values. E = (Round to three decimal places as needed.)
A drug company claims that their products’ contaminations never vary by more than 2%. Sample of 5 specimens were tested and the percentages of the purities are recorded as Observation no. 1 2 3 4 5 Percentages (%) 98.8 97.2 98.9 97.7 97.9 a. Do the sample data have enough proof to oppose the manufacturer's claim? (HINT: take the range of 2% equal 4o.) b. Find a 90% confidence interval for o?.
Note: please don’t use excel.
Suppose the lengths of human pregnancies are normally distributed with μ = 266 days and o 16 days. Complete parts (a) and (b) below. (a) The figure to the right represents the normal curve with μ = 266 days and o=16 days. The area to the right of X = 290 is 0.0668. Provide two interpretations of this area. Provide one interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) O A. The proportion of human pregnancies that last less than OB. The proportion of human pregnancies that last more than days is days is Provide a second interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) O A. The probability that a randomly selected human pregnancy lasts more than OB. The probability that a randomly selected human pregnancy lasts less than days is days is or more than and days…
please answer all subparts
Find the margin of error for the given values of c, o, and n. c = 0.90, o = 3.6, n = 81 E= Click the icon to view a table of common critical values. (Round to three decimal places as needed.)
Find the margin of error for the given values of c, o, and n. c= 0.95, o = 2.1, n = 64 Click the icon to view a table of common critical values. E = (Round to three decimal places as needed.)
Find the margin of error for the given values of c, o, and n. c= 0.95, ở = 3.8, n= 49 Click the icon to view a table of common critical values. E = (Round to three decimal places as needed.)
Using the standard normal table in the Toolbox, determine a Z-value. Each response must include three numerical values and be rounded to the hundredths place. Question 1 The cumulative area to Z is 0.80. Question 2 The cumulative area to Z is 0.1762. Question 3 The area between Z and negative infinity is 0.6664. Question 4 The area between Z and positive infinity is 0.119.

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