Question 10:The length of needles produced by a machine has a standard deviation of 0.03 inches. Assuming thedistribution is normal, how large of a sample is needed to determine, within a margin of error of 0.008inches, the mean length of all needles produced to 9Answer:

Given that Standard deviation=0.03 Margin of error=0.008 Mean=9 Let alpha=5%=0.05 Find sample…

Answered: Question 10: The length of needles…

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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The blood pressure in millimeters was measured for a large sample of people. The average pressure is 140 mm, and the SD of the measurements is 20 mm. The histogram looks reasonably like a normal curv Use the normal curve to estimate the following percentages. Choose the answer that is closest to being correct. A 19.1% B 30.9% C 38.2% D 69.1% E 68.27% A The percentage of people with blood pressure between 130 and 150 mm. B The percentage of people with blood pressure between 140 and 150 mm. D The percentage of people with blood pressure over 150 mm.
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Solve this problem to find the sample standard deviation
The attached plots were constructed using a sample of 272 observations. Each observation gives the elapsed time (in minutes) of an eruption of Old Faithful geyser in Yellowstone national park. d. A sample of 6 durations have values: 4.850, 2.200, 2.900, 4.367, 1.750, 3.966. What is the mean of this sample? e. What is the standard deviation of the sample in d. if ∑ni=1x2i=74.635∑i=1nxi2=74.635?( attached as pic) f. Give the shape and parameters of the sampling distribution of the sample mean when n=272n=272 if μ=3.4μ=3.4 and σ=1.16σ=1.16. Explain how you know the shape the distribution takes on.

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Question 10: The length of needles produced by a machine has a standard deviation of 0.03 inches. Assuming the distribution is normal, how large of a sample is needed to determine, within a margin of error of 0.008 inches, the mean length of all needles produced to 9 Answer: