Pressure values measured by various probes in the test section of a wind tunnel to obtain the freestream velocity have been given inthe table below. The researcher who made the measurements concluded that the 7th reading had a value of -2.567 as the "deviationfrom the mean" and eliminated the data point based on the Chauvenet criterion. However, she later realized that she used the factor"1/n" instead of "1/(n-1)" in the calculation of standard deviation, which was used for data sets with a total number of data pointsless than 20. Find the value of the 7th reading.n=1 p=246n=2 p=240n=3 p=242n=4 p=245n=5 p=245n=6 p=242n=7 p=?n=8 p=244n=9 p=244

Given information: The data represents the values of readings of 9 measurements.

Answered: Pressure values measured by various…

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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Only part B
There are two samples of children taken from a population. In the first sample, mean of age of 20 children is 8.5 years with standard deviation 3 years. In the second sample mean of age of 30 children is 7 years with standard deviation 2 years. If we combine these samples, what are the mean and the standard deviation of the combined sample? Age in which sample is more spread and why? Show your work by using formula and use 1 decimal place.
In a random sample of 7 cell phones, the mean full retail price was $548.40 and the standard deviation was $188.00. Further research suggests that the population mean is $432.18. Does the t-value for the original sample fall between - to 95 and t, 95? Assume that the population of full retail prices for cell phones is normally distributed. The t-value of t= (Round to two decimal places as needed.) fall between - to 95 and to 95 because to 95 tents
The combined SAT scores for the students at a local high school are normally distributed with a mean of 1527 and a standard deviation of 306. The local college includes a minimum score of 2476 in its admission requirements. What percentage of students from this school earn scores that satisfy the admission requirement? P(X> 2476) = % Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of executives of major corporations. He plans to use the blood pressures of a random sample of executives of major corporations to estimate μ. Assuming that the standard deviation of the population of systolic blood pressures of executives of major corporations is 27mm Hg, what is the minimum sample size needed for the researcher to be 95% confident that his estimate is within 5mm Hg of μ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).
Suppose X is a non-standard normal variable, with a mean of 139, and std deviation of 15 (i.e. X~N(139,15)). You have an observation (z) on a standard normal scale (i.e. Z~N(0,1)). If z = 1.29, what is it on an X scale? How can I calculate this using excel & by hand?
The brain volumes (cm) of 50 brains vary from a low of 906 cm" to a high of 1488 cm. Use the range rule of thumb to estimate the standard deviation s and compare 3 13 the result to the exact standard deviation of 171.4 cm", assuming the estimate is accurate if it is within 15 cm 3 The estimated standard deviation is cm. (Type an integer or a decimal Do not round.) Compare the result to the exxact standard deviation. A. * The approximation is not accurate because the error of the range rule of thumb's approximation is less than 15 cm 13 The approximation is accurate because the error of the range rule of thumb's approximation is less than 15 cm cm³ OC. 3. The approximation is not accurate because the error of the range rule of thumb's approximation is greater than 15 cm 3 9 . The approximation is accurate because the error of the range rule of thumb's approximation is greater than 15 cm". cm³ in el Cick to select your answer(s). er javascript:doBxercise(3)- selected from a set of...…
The combined SAT scores for the students at a local high school are normally distributed with a mean of 1533 and a standard deviation of 304. The local college includes a minimum score of 925 in its admission requirements.What percentage of students from this school earn scores that satisfy the admission requirement?P(X > 925) = %Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of executives of major corporations. He plans to use the blood pressures of a random sample of executives of major corporations to estimate u. Assuming that the standard deviation of the population of systolic blood pressures of executives of major corporations is 25 mm Hg, what is the minimum sample size needed for the researcher to be 99% confident that his estimate is within 6 mm Hg of u? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.) 2 B M
A survey taken several years ago found that the average time a person spent reading the local daily newspaper was 10.8 minutes. The standard deviation of the population was 3 minutes. To see whether the average time had changed since the newspaper's format was revised, the newspaper editor surveyed 37 individuals. The average time that the 37 people spent reading the paper was 12.3 minutes. At =α0.01 , is there a change in the average time an individual spends reading the newspaper? Find the 99% confidence interval of the mean. Find the 99% confidence interval of the mean. Round the answers to nearest whole number. <<μ
AN ENGINEERING STUDENT`SPENDS BETWEEN 5 MINUTES TO 15 MINUTES EATING HIS LUNCH. FOR THE SITUATION, DETERMINE THE STANDARD DEVIATION ans .2887
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